Guys,
Ive been a bit busy and this is my design idea. OK its a starting point and have at the moment three bearings on it, one at the very bottom just in front of the top of the diff, one slightly higher than that and another at the top just above the layshaft gear so keeping the tension in the right places. This takes away having to have the tensioner inside the gear box and less agro. I found the spacers but when the time is correct I will cut down the poles that I use on the chassis and wing mount for a perfect fit.
Give me your thoughts on this guys.