I blind riveted the attach angles to the gear webs using LP4-3 rivets. I had to grind down the tips of the rivets and pull them in small steps (pounding the rivets further in each time).
I also installed the nutplates using MK-319-BS rivets since there wasn’t enough room to get a normal rivet squeezer in here after riveting these to the gear webs (and the nutplates couldn’t be installed first since they would have interfered with squeezing the LP4-3 rivets). I just realized that I forgot to cut the notch in these for the fuel line grommet. I’ll have to do that in place.
