This is a Race Quadcopter inspired frame for the Blade Nano QX.
It is about 2g heavier than the original one when printed in PLA. The quad is in my opinion a little more agile than with the original frame.
The stock and most of the aftermarket batteries fit the holder tightly, a few are a looser fit but stay in it.
For the assembly you will need four M1.4 screws that are at least 2.4mm long to attach the upper frame part to the lower one. And a little bit of double sided tape that is at least 1.7mm thick to attach the flight controller to the frame. Position the flight controller centered on the lower frame.
It does fly with the original motors but i recommend using stronger ones.
20% but doesn't really matter