The mounting rails are next up. They were dry fitted before the formers were installed so little sanding needed here, Epoxied in place. The holes for the 4-40 1/2 in bolts were drilled and set into the aluminum extrusions. I had used a Sharpie marker on the plates to better see where to drill. The ply mounting plate was measured and drilled with a 3/16 bit. The holes for the blind nuts were enlarged with the Unibit to 7/32. Unfortunately the blind nuts protruded past the surface and needed to be filed down so the aluminum gear rest flush with the ply plate. The fuse needed trimming to make the gear fit flush with the plate and former. The plate was centered and 3/16 holes drilled in the rails. The Unibit was used to enlarge the holes for the blind nuts and they were placed with epoxy.

Pete