Hello,
This setup is lighter than your previous gear box no ?
Don't forget to cover the front motor holes with tape to avoid the dust to go in.
Still all good with your 1520 ? I race with mine now, it rarely breaks 40°C (geared for 40 mph), so
NuZ
Inferno VE MMv3 NEU-CC 1515/1Y 4S "Flying machine"