Help needed please. I want a bit of my wheels to show on both sides so it can be driven upside down if flipped. I am making my own motor mounts but can't work out the measurement to make the wheels show. My wheels are 120mm and the height of the bit including armour is 102. What measurements do I need to work of to make the mounts sit right so wheels protrude each side. Hope this makes sense!?!?