After following the connection tutorial, my Roli was going backwards but turning in the right direction. After some tinkering and using the direction/correction charts in Rich's excellent l298n tutorial I determined that the wiring harness was connected backwards. Reversed the connection on all the wires except the powerband ground. So, to save other owners time figuring it out..... If you connect Roli following the tutorial and he goes bacwards, just flip the 6 pin cable around, hooking up the black wire to d0 and the green to d5 and all the others in order of the cable.