There is quite a lot of M4 rivnets that have to be installed through out the center channel.
I purchased a metric step drill bit so that could quickly up-size all of the holes to accommodate the M4 and M5 rivnuts. The metric size removed a lot of the trial fitting because I could just tape the bit where I needed to stop at and move on to the next hole.
I didn't want to over drill these holes because I need these rivnut to fit tightly and minimize any of these rivnuts spinning down the road.
Tip
In several places I needed to use a 90 degree drill attachment to get into tight spaces when up-sizing holes. This drill attachment will come in handy through out the build process and I would highly recommend purchasing one.
All rivnuts are installed with J-BWeld Steel Reinforced Epoxy
Forward center channel skins attached to the firewall
Installing M4 rivnuts on the forward center channels supports.
Center channel support and lower support rivnuts installed
Rear center channel support rivnuts installed
Control skin covers
Installation of rivnuts in the floor boards
In the picture above I am actually missing another rivnut, based on the build manual there are supposed to be three holes but I only have two.
Notes
- All of center channel skins were cleaned using Simple Green aircraft cleaner and then washed in Bosh Aluma Bright and Bonderite 1201 aero chemicals to treat and prevent surface corrosion.
- All center channel skins were power coated and prepped for final assembly.