Installed the two shoulder harness bolts and large washers in the root tube.
Installed the voltage regulator (bolted down to the "Y" plate on the fuselage).
Modified both control sticks to allow standard (smaller diameter) bicycle style grips. Removed the top 4 3/4" of the 1" stick using a pipe cutter and dressed the ends. Inserted 7/8" ODX7" piece of 6061-T6 X .049 into the sticks 2 1/4" and riveted. Nice clean snug fit.
Drilled outboard edges of horizontal stabs to accept finlets at a later date if I decide I want to.
I will install anchor nuts into all four holes so the stabs won't require cutting fabric to install finlets.