A custom design using old motors I had (Emax 1806). Flies great on a 850mAh 4S with high pitched props (like Gemfan 4052). I get up to 7min flight time.
Arms will fit 12mm to 16mm M2 motor mounting patterns. 20x20mm stack

Carbon plate weight is ~26g, so a sub-250g build is achievable with the right components (mine weights 280g with a 850mah 4S)

Canopy will fit Caddx Ratel lens and can be downloaded from

• STL : https://drive.google.com/file/d/1BwuP6XSgQLjJw_0WIGdzM6ax3PZF4g9_/view?usp=sharing
• STEP : https://drive.google.com/file/d/1BOP2LjFgyAJJq9M8bTZz-k0gtTHl8YsC/view?usp=sharing

Required Hardware :

• 25mm Standoffs ×2
• M3×8 Countersunk screws ×2
• M3×8 Button Head screws ×2
• M2×25 (max) Countersunk screws ×4 for stack.
   

Enjoy !