Wired elevator trim motor to lead in fuselage. Crimped d-sub pins on each wire and secured each wire with shrink wrap. Encased the 5 wires with a large piece of shrink wrap and then encased wire in wire loom. Trim motor operates normally using trim switches on stick grips. Checked elevator travel for up and down limits. Installed tail cone stinger. Test fit wing root cuffs from Aerosport Products. These are prototypes that I was given to test the fit. Balanced ailerons-- previously had shot foam into aileron spars about 20" from inboard end. Let it cure for 2 full days at 70 F. (the foam took much longer to setup inside the spar). Clamped small alum angles on edge of work table and inserted bolts into hinge that rode on the angles. Poured in dry lead shot to balance-- took 65oz. (ailerons have been painted). Poured that shot out into cup and mixed West Systems epoxy (2 pumps each from small pumps). After thoroughly mixing, weighed slurry and it came to 66oz. Poured slurry into spar and will let set for day or 2 before sealing end of spar with foam.