farmer I already know what your question is going to be on the LST2 and that is where to put the speed sensor right? mine wouldn't fit on the flywheels but I just looked at the manual for the xxl that just came out to see where they mounted it and it is mounted below the radio box and reading from the drive shaft I just haven't made a mount for it yet but I will. I run the DX3S on both my racing BL slash and the LST2.