Dual sticks are easy. Where the plans place the single stick, place a control horn, with the same offset bolt holes as on the existing stick, in the center of a supporting tube the mounts on the main wing spar near the outside foot of each seat. Cut the tube to mount the control sticks between the legs. The current control cabling will stay the same.
Larry Severson Fountain Valley, CA 92708 (714) 968-9852 lar...@socal.rr.com