Linkage that was use Seacrest hardware from F34 Unlimited.
elv. likage rod 60mm servo arm 20-25mm
rudder 120 my servo arm come out 145mm from rear end of fuse to center of servo arm (servo arm 1in long)
air 80mm servo arm 20-25mm
the CG calls for 260mm from rear corner of canopy base with a range of 10mm less or plus 30mm. I end up at 305mm or just forward of wing tube.
Battery tray end up with two inch of the tray forward of land gear .

Jr