Riveted on the horn brace. I used the optional blind rivets on the bottom. installed the counterweight. I put some blue thread sealant on the screws as extra insurance against them backing out. Clecoed on both skins. Riveted the R913 counterbalance skin to the R901 skins. I had trouble with these and ended up drilling out several on both sides. Clecoed on R903 and blind riveted it to the spar.
