X-celorin S problems

[Body Paint]

First time out and I have problems already. I am running it with a 7.5R in 2wd.

Firstly I am very unimpressed by the performance, car feels slow and underpowered compared to running the GTB.

Secondly, with Lipos in and the Lipo cutoff "on" I am finding that the speedo will occasionally cutout when I gun the throttle and I have to let off the power and reapply the power.

I haven't done any fiddling with it yet, but has anyone else had and/or cured these problems?