The Mugen 4mm chassis is great and is milled out for the bulkhead to sit lower. Kawahara has a 4mm chassis the same (milled out). 3Racing 4mm chassis is not milled out, so everything sits an extra 1mm high. Nice and stong, just the CG is higher.
Xray XB4 and XB2
Futaba 4PX and servo's
Powered by Nosram motors and FX engines.
Many thanks to HEI and Perth RC for their support over the years.