diff --git a/python/PiFinder/displays.py b/python/PiFinder/displays.py
index cab8ce0c..376a14c6 100644
--- a/python/PiFinder/displays.py
+++ b/python/PiFinder/displays.py
@@ -32,13 +32,27 @@ def get(self, color_intensity):
 class DisplayBase:
     resolution = (128, 128)
     color_mask = RED_RGB
+    titlebar_height = 16
 
     def __init__(self):
         self.colors = Colors(self.color_mask, self.resolution)
 
+        # calculated display params
+        self.centerX = int(self.resolution[0] / 2)
+        self.centerY = int(self.resolution[1] / 2)
+        self.fov_res = min(self.resolution[0], self.resolution[1])
+
     def set_brightness(self, brightness: int) -> None:
         return None
 
+    @property
+    def resX(self) -> int:
+        return self.resolution[0]
+
+    @property
+    def resY(self) -> int:
+        return self.resolution[1]
+
 
 class DisplayPygame(DisplayBase):
     resolution = (128, 128)
@@ -83,10 +97,11 @@ def set_brightness(self, level):
 
 class DisplayST7789(DisplayBase):
     resolution = (320, 240)
+    titlebar_height = 20
 
     def __init__(self):
         # init display  (SPI hardware)
-        serial = spi(device=0, port=0)
+        serial = spi(device=0, port=0, bus_speed_hz=52000000)
         device_serial = st7789(serial, bgr=True)
 
         device_serial.capabilities(
diff --git a/python/PiFinder/plot.py b/python/PiFinder/plot.py
index 03e9e0b7..7f5af5ca 100644
--- a/python/PiFinder/plot.py
+++ b/python/PiFinder/plot.py
@@ -27,8 +27,9 @@ class Starfield:
     specified RA/DEC + roll
     """
 
-    def __init__(self, colors, mag_limit=7, fov=10.2):
+    def __init__(self, colors, resolution, mag_limit=7, fov=10.2):
         self.colors = colors
+        self.resolution = resolution
         utctime = datetime.datetime(2023, 1, 1, 2, 0, 0).replace(tzinfo=utc)
         ts = sf_utils.ts
         self.t = ts.from_datetime(utctime)
@@ -42,7 +43,7 @@ def __init__(self, colors, mag_limit=7, fov=10.2):
             self.raw_stars = hipparcos.load_dataframe(f)
 
         # Image size stuff
-        self.target_size = 128
+        self.target_size = max(self.resolution)
         self.diag_mult = 1.422
         self.render_size = (
             int(self.target_size * self.diag_mult),
diff --git a/python/PiFinder/ui/base.py b/python/PiFinder/ui/base.py
index 749c0838..40d430bb 100644
--- a/python/PiFinder/ui/base.py
+++ b/python/PiFinder/ui/base.py
@@ -21,7 +21,6 @@ class UIModule:
     __button_hints__ = {}
     __uuid__ = str(uuid.uuid1()).split("-")[0]
     _config_options = None
-    _title_bar_y = 16
     _CAM_ICON = ""
     _IMU_ICON = ""
     _GPS_ICON = "󰤉"
@@ -29,7 +28,7 @@ class UIModule:
 
     def __init__(
         self,
-        display: Type[DisplayBase],
+        display_class: Type[DisplayBase],
         camera_image,
         shared_state,
         command_queues,
@@ -40,19 +39,22 @@ def __init__(
         self.button_hints = self.__button_hints__
         self.button_hints_timer = time.time()
         self.switch_to = None
-        self.display = display.device
-        self.colors = display.colors
+        self.display_class = display_class
+        self.display = display_class.device
+        self.colors = display_class.colors
         self.shared_state = shared_state
         self.ui_state = shared_state.ui_state()
         self.camera_image = camera_image
         self.command_queues = command_queues
-        self.screen = Image.new("RGB", display.resolution)
+        self.screen = Image.new("RGB", display_class.resolution)
         self.draw = ImageDraw.Draw(self.screen)
         self.font_base = fonts.base
         self.font_bold = fonts.bold
         self.font_large = fonts.large
         self.font_small = fonts.small
 
+        # Display resolution stuff
+
         # screenshot stuff
         root_dir = str(utils.data_dir)
         prefix = f"{self.__uuid__}_{self.__title__}"
@@ -201,7 +203,10 @@ def screen_update(self, title_bar=True, button_hints=True):
         if title_bar:
             fg = self.colors.get(0)
             bg = self.colors.get(64)
-            self.draw.rectangle([0, 0, 128, self._title_bar_y], fill=bg)
+            self.draw.rectangle(
+                [0, 0, self.display_class.resX, self.display_class.titlebar_height],
+                fill=bg,
+            )
             if self.ui_state.show_fps():
                 self.draw.text((6, 1), str(self.fps), font=self.font_bold, fill=fg)
             else:
diff --git a/python/PiFinder/ui/chart.py b/python/PiFinder/ui/chart.py
index 21a20b82..6b1dde99 100644
--- a/python/PiFinder/ui/chart.py
+++ b/python/PiFinder/ui/chart.py
@@ -43,7 +43,7 @@ class UIChart(UIModule):
     def __init__(self, *args):
         super().__init__(*args)
         self.last_update = time.time()
-        self.starfield = plot.Starfield(self.colors)
+        self.starfield = plot.Starfield(self.colors, self.display_class.resolution)
         self.solution = None
         self.fov_list = [5, 10.2, 20, 30, 60]
         self.fov_index = 1
@@ -94,7 +94,11 @@ def plot_markers(self):
 
             marker_image = ImageChops.multiply(
                 marker_image,
-                Image.new("RGB", (128, 128), self.colors.get(marker_brightness)),
+                Image.new(
+                    "RGB",
+                    self.display_class.resolution,
+                    self.colors.get(marker_brightness),
+                ),
             )
             self.screen.paste(ImageChops.add(self.screen, marker_image))
 
@@ -115,12 +119,12 @@ def draw_reticle(self):
 
         fov = self.fov
         for circ_deg in [4, 2, 0.5]:
-            circ_rad = ((circ_deg / fov) * 128) / 2
+            circ_rad = ((circ_deg / fov) * self.display_class.fov_res) / 2
             bbox = [
-                64 - circ_rad,
-                64 - circ_rad,
-                64 + circ_rad,
-                64 + circ_rad,
+                self.display_class.centerX - circ_rad,
+                self.display_class.centerY - circ_rad,
+                self.display_class.centerX + circ_rad,
+                self.display_class.centerY + circ_rad,
             ]
             self.draw.arc(bbox, 20, 70, fill=self.colors.get(brightness))
             self.draw.arc(bbox, 110, 160, fill=self.colors.get(brightness))
@@ -184,7 +188,10 @@ def update(self, force=False):
                 self.last_update = last_solve_time
 
         else:
-            self.draw.rectangle([0, 0, 128, 128], fill=self.colors.get(0))
+            self.draw.rectangle(
+                [0, 0, self.display_class.resX, self.display_class.resY],
+                fill=self.colors.get(0),
+            )
             self.draw.text(
                 (18, 20), "Can't plot", font=self.font_large, fill=self.colors.get(255)
             )
diff --git a/python/PiFinder/ui/console.py b/python/PiFinder/ui/console.py
index 71603642..552e57b0 100644
--- a/python/PiFinder/ui/console.py
+++ b/python/PiFinder/ui/console.py
@@ -82,7 +82,8 @@ def update(self, force=False):
             if self.welcome:
                 # Clear / write just top line
                 self.draw.rectangle(
-                    [0, 0, 128, self._title_bar_y], fill=self.colors.get(0)
+                    [0, 0, 128, self.display_class.titlebar_height],
+                    fill=self.colors.get(0),
                 )
                 self.draw.text(
                     (0, 1),
diff --git a/python/PiFinder/ui/status.py b/python/PiFinder/ui/status.py
index aa08518d..ee547739 100644
--- a/python/PiFinder/ui/status.py
+++ b/python/PiFinder/ui/status.py
@@ -88,7 +88,7 @@ def __init__(self, *args):
         super().__init__(*args)
         self.version_txt = f"{utils.pifinder_dir}/version.txt"
         self.wifi_txt = f"{utils.pifinder_dir}/wifi_status.txt"
-        self._draw_pos = (0, self._title_bar_y)
+        self._draw_pos = (0, self.display_class.titlebar_height)
         with open(self.wifi_txt, "r") as wfs:
             self._config_options["WiFi Mode"]["value"] = wfs.read()
         with open(self.version_txt, "r") as ver: