As pictured, the elevators prolinks are 2". That ensures about 3/8" thread (or close to it) in each end, both clevis and ball link. They are from Tower, Associated Car parts, blue anodized. Look pretty good, and work.

Batteries are mounted to the front of the half-bulkhead just aft of the sloping tunnel housing. Don't know if that is the stated 6.5" aft of l.e. at fuse needed, but will check that tomorrow.

One word - the hinge slots on the inboard dual-hinge slots on the ailerons were pretty large oversize! I used Gorilla glue, really cleaning frequently while curing, but after could see that the glue had expanded appropriately to really make them solid. ALL of the other hinge slots were just fine.

I have NO beefs - ANYPLACE AT ALL - with this arf. VERY very nice quality.