diff --git a/__init__.py b/__init__.py
index 488e0b3..3896ed2 100644
--- a/__init__.py
+++ b/__init__.py
@@ -279,10 +279,13 @@ def validate_config(self, config: Dict[str, Any]) -> List[str]:
                 if cat not in CATEGORIES:
                     errors.append(f"Unknown category '{cat}'")
 
-        for key in ("rotate_seconds", "refresh_seconds"):
-            value = config.get(key, 60)
-            if not isinstance(value, int) or value < 60:
-                errors.append(f"{key} must be an integer >= 60")
+        rotate_value = config.get("rotate_seconds", 600)
+        if not isinstance(rotate_value, int) or rotate_value < 60:
+            errors.append("rotate_seconds must be an integer >= 60")
+
+        refresh_value = config.get("refresh_seconds", 300)
+        if not isinstance(refresh_value, int) or refresh_value < 30:
+            errors.append("refresh_seconds must be an integer >= 30")
 
         message = config.get("message", "") or ""
         if len(message) > 22:
diff --git a/docs/board-ally.png b/docs/board-ally.png
new file mode 100644
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diff --git a/docs/board-arc.png b/docs/board-arc.png
new file mode 100644
index 0000000..cb55c49
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diff --git a/docs/board-diagonal.png b/docs/board-diagonal.png
new file mode 100644
index 0000000..77b358c
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diff --git a/docs/board-display.png b/docs/board-display.png
new file mode 100644
index 0000000..6e588d0
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diff --git a/docs/board-equality.png b/docs/board-equality.png
new file mode 100644
index 0000000..fec9ae5
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diff --git a/docs/board-heart.png b/docs/board-heart.png
new file mode 100644
index 0000000..188af26
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diff --git a/docs/board-progress.png b/docs/board-progress.png
new file mode 100644
index 0000000..6e588d0
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diff --git a/docs/board-sparkle.png b/docs/board-sparkle.png
new file mode 100644
index 0000000..a91c430
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diff --git a/docs/board-trans.png b/docs/board-trans.png
new file mode 100644
index 0000000..11a00e2
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diff --git a/manifest.json b/manifest.json
index 305507e..8f37f0e 100644
--- a/manifest.json
+++ b/manifest.json
@@ -164,9 +164,49 @@
   "screenshots": [
     {
       "src": "docs/board-display.png",
-      "alt": "Pride art displayed on a Vestaboard",
-      "caption": "Rainbow Pride flag rendered on the flagship 6x22 display",
+      "alt": "Rainbow Pride flag on a Vestaboard",
+      "caption": "Rainbow Pride flag — six stripes from red to violet",
       "primary": true
+    },
+    {
+      "src": "docs/board-trans.png",
+      "alt": "Trans Pride flag on a Vestaboard",
+      "caption": "Trans Pride flag — blue / white / red / white / blue"
+    },
+    {
+      "src": "docs/board-progress.png",
+      "alt": "Progress Pride base flag on a Vestaboard",
+      "caption": "Progress Pride base flag (chevron overlays land in v0.3)"
+    },
+    {
+      "src": "docs/board-ally.png",
+      "alt": "Ally flag on a Vestaboard",
+      "caption": "Ally flag — black/white stripes with a centered rainbow pyramid"
+    },
+    {
+      "src": "docs/board-heart.png",
+      "alt": "Rainbow Heart on a Vestaboard",
+      "caption": "Rainbow Heart — red apex fading to violet point on black"
+    },
+    {
+      "src": "docs/board-diagonal.png",
+      "alt": "Rainbow diagonal pattern on a Vestaboard",
+      "caption": "Rainbow Diagonal — diagonal sweep across the spectrum"
+    },
+    {
+      "src": "docs/board-sparkle.png",
+      "alt": "Rainbow Sparkle on a Vestaboard",
+      "caption": "Rainbow Sparkle — slowly-evolving sparkle field, one tile per 30s"
+    },
+    {
+      "src": "docs/board-arc.png",
+      "alt": "Rainbow Arc pyramid on a Vestaboard",
+      "caption": "Rainbow Arc — centered pyramid bands, red on top"
+    },
+    {
+      "src": "docs/board-equality.png",
+      "alt": "Equality symbol on a Vestaboard",
+      "caption": "Equality — two yellow bars on a blue field"
     }
   ],
   "demos": [