I was trying to install the rudder cable brackets and the springs, but I needed to put in some rivnuts, and I needed to make the holes big enough for the rivnuts. Unfortunately, the luggage compartment floor was already installed, so I couldn't get a drill in there. I bought a right angle drill head and was able to drill the holes for the 6 rivnuts holding the brackets, and those are the ones I was most worried about. The ones holding the springs don't get adjusted, but the brackets look like they do. I was able to put the rivnuts in and hope they never need to get drilled out! The holes for the M5 bolt for the springs is another problem, though. I couldn't get the right angle head and drill bit in there. So, I took an old drill and cut it off. As it turns out, the flutes make it really hard (OK, impossible) to get the bit in place without a lot of runout. Like, a 30 degree angle of runout. Like, well, look at the picture.to see. I even tried wrapping a bunch of tape around the drill to make it rounder, but that was a no-go, too. I would just put the M5 bolts in with a nylock nut on the back, but the hole is too small for an M5 bolt, too, so I guess it is back to Sling to ask what to do now. Sigh. The QuickBuild is supposed to make it easier and faster!