Riveted in MK1000-3 on left side of rudder for static wick mounts. Mixed and spread out tank sealant on R-1006 (both sides) and back riveted one side of trailing edge, as per other builders suggestions, using long angle iron bucking bar created previously. Forgot to back rivet R-1003B on to right side of rudder and used one CCR264SS-3-2 at trailing edge to attach skin. If I cannot get my rivet squeezer on the 2nd to last hole in the trailing edge of R-1003B, will use a second CCR264S-3-2, as this is opposite the forward static wick mount.