Sanded, cleaned and primed the rudder skin. ( I tried an ergonomic handle grip for the spray can, which worked OK until near the end, when it sprayed drips of primer all over the skin.) Clecoed R-606 / 607 / 608 plates to R-802 spar. Fabricated .032 spacer for spar/rib assembly. Trimmed, filed and polished R-410 rudder horn brace per plans. Used a belt sander for first time, instead of a Vixen file. The right tool certainly makes things go fast!