🧱 Completeness checklist
Challenger Set 300 · set 4222 — 120 part types · 355 pieces · 11 colours · 2 minifigs
📥 Drop photos or a parts file to auto-check
📸 Auto-check a colour: photograph each colour — one colour per photo · parts laid flat & not touching · on a plain white A4 sheet · phone straight overhead · even light, no shadow. We tick what we can see; you confirm the rest.
0 / 120
Jump to colour
Minifigures
Blue
Yellow
Red
White
Black
Light Gray
Dark Gray
Trans-Clear
Trans-Red
Trans-Yellow
Bright Green
Tick a part when you've found them all. Your ticks are saved on this device. Counts are the official Rebrickable inventory for this set — spares included where the set ships them.