Hey, after boshing my mech it broke, so i have made one, its basically a 6mm plate of aluminium shaped to suit. i have then put a hole in for the axel bolt, one for the jocky wheel post and a slot so that the chain tension can be adjusted. it is attached to my hanger and also by the axel bolt. the jocky wheel is held on by a 10mm stainless steel bar with an M6 thread to screw it on tis allows the chain line to be adjusted left to right. It has 2 adjustments, chain line and chain tension. take a look see what you think. I am going to make a sprung one with 2 jocky wheels soon which should be better any suggestions, or comments to improve?