I have been using these motors for some yaers in my Antweight "Saifu" kits my tracked antweight "Swiss cheese wedge of Doom" and my fairyweight wedge "Bleuhh Cheese"
The latest version of my Antweight "Saifu". It uses the 500rpm version with 3S Lipo and 2" wheels. Its ability in the arena can be seen in this
video.
Whilst the Chassis design needs some work to be competitive the 500rpm versions of the motors provided good performance even with tracks in my 3D printed Antweight "Swiss
Cheese wedge of Doom"