Center Section - Seat Belts (2)

I spent most of the day crawling under vehicles, so not much action on the plane.  I have about 10 rivets that I need help setting before I move on to the next big step (center section to tailcone), so I'll enlist Rose when she's back in a few days.  I could throw up the bat signal for help, but it's about 10 minutes worth of work and not worth the drive for anyone else.  In the meantime, I'm just slowly working through the seatbelt crotch strap mounts.  I finally broke down and bought a used pneumatic right angle drill on Ebay.  I'm still waiting on the drill bits to arrive (it takes threaded bits), but I can already tell this is going to be a huge help.  The head is much, much smaller than my other cheap right angle attachment, so it'll be able to get into tighter spots without forcing the drill bit to be at an angle.  That was a big struggle with this seatbelt mount, so I'm going to wait to finish the passenger side mount when I have the drill bits.  These drills are insanely expensive for some reason, but I got a good deal on this one vs buying new.  I have a feeling I'll be kicking myself for not buying it sooner.  I could have used it in a lot of locations in the wings.

I used a nutplate as a template and drilled the additional holes in the tops of the mounts.  I dimpled the holes, as well as the nutplates, then riveted the nutplates on.  The mounts are riveted in place with pop rivets.  The primer on the rib webs looks all scratched up because it is.  I couldn't get the holes deburred very well with the deburring bit (the rib aluminum is much harder than other sheet aluminum), so I just took sand paper to them.  The sand paper scuffs up the primer, but still doesn't burn through it.

I don't need the hardware for ages of course, but figured it would be easier to just drop the bolt and nut in place now vs having to search through the plans later on to figure out what size I use.