Today I riveted the "mounting box & rib assembly“ to the main spar carry through, lots of hand pulling of 4mm rivets, the aileron auto pilot servo mount is installed using stainless screws with medium strength thread locking compound & I countersunk all required holes for the seat rails. I riveted the nylon guides to the alloy rails & will rivet the inboard rails to the structure tomorrow. PGC gave me a good tip today in leaving the outboard seat rails unriveted until after the wings are attached, gives much better access to the wing bolts & nuts.
