What a *********** of an afternoon!
After trimming, mowing and blowing again, I knocked off work and got back to the rear seat project for the Brick. All I had left was the bottom mount bar that I painted last night.
That was all. Fifteen minutes, tops.
I changed the location of the mount to bring it a little farther forward, tilting the seat back a little farther--it was more comfortable. Found some nice SS 5/16" nuts, bolts and washers. Marked and drilled the holes after checking down below to be sure there was nothing I didn't want to drill a hole in. All clear! I used an existing sheet metal screw from the factory as a landmark to be sure I was in the right place. Dropped in the mount and bolts and went back under to install the nuts and washers.
NO BOLTS! The screw I thought was my landmark was the wrong screw--there's another one six inches forward of it, hiding under the carpet. That was what I oriented off of. Where I drilled the holes is right above one of the main strength box-beam cross-members--the holes are completely blind!
Well, a while back, I bought this:
for $5 at a yard sale. Now would be a good time to use a rivnut!
Problem is, that POS setting tool. It would struggle with a 1/8" aluminum pop rivet, not to mention a 5/16" steel rivnut. I figured out a way to use my impact driver, drilled the hole to the recommended 1/2"
That does say "Use 1/2" Drill", right?
I set the rivnut and went to unscrew the stuff I used to set it... and it fell right out.
That's about as fully expanded as it gets, and it's .45" according to my calipers.
Back to the drawing board. I found some 5/16" shaft lag screws with extra-large threads and mixed up some JB Weld. Cleaned surfaces and "screwed and glued" the damned mount down in the original location--I now have a 1/2" hole where I wanted to move it.
Now to figure out how to waterproof those holes....
But the gawddamned seat is finally mounted.
Now for beer--while I put up the tools and supplies.
From the pliers rack to the bench vise, that benchtop was clear a few hours ago....
Another "fifteen-minute job".