HBK2 Tail Pulley Mod

on my early days with my hbk2, i kept having promblem with the tail belt keep slipping frm the pulley. hover once, fix once, hover once, fix once. fed up with all the touble, i search for a solution in the net.

the pulley somehow is not low enough to hold the belt in place. so the solution is to lower it. i used a spacer for that.