I just got a brand new lrp30 pullstart for my XL and a 5.9 brand new so the roto starter does fit the lrp 30 from the 5.9 can put roto starter on the lrp 30?
drill or cut the corners of hpi roto-backplate and use thread-lock, longer screws and washers to keep it in place... glued the whole roto-unit onto the plate with thread-lock, ...works for me, for tens of starts this far