I had to change a few things for reliability when using mod motors. I'm using the front spool from the 2.0. The 3.0 uses the plastic blades and I found them too unreliable. I also had problems with the low friction rear belt breaking or stripping so I use the normal belt instead which is a lot more durable. You can still use the low friction front belt if you prefer that. The rest of the car has been really reliable on foams.

Hello, great I will change the position of the shock. What more have you done with the setup compared with rubbertires?
Regards
Björn