Rob as promised this is my proto but ones Im selling will look pretty much the same all depending on the colour of the washers. Its pretty simple but believe me ive tested every concievable method and this is the best, plus it doesnt stop motor movement so stock and modified gear ratios wont be affected.
and also you can tighten the belt or losen meaning your not set to one particular tension setting especially when the belt stretches it comes in handy.