@drodio Hey Daniel I would suggest stainless steel rivets instead of aluminum... if you are going to go that route... but a rivnut + bolt is always going to be stronger than just a rivet by itself, and gives you the flexibility to remove things if need be...
Are you using a punch after you marked your hole location on the wall ?
Makes it easier to keep drill bit from walking when you first start the hole for the rivnut...
Are you using a stepper drill bit to enlarge to the right for the rivnut? that helps to ease the hole in one direction or another as you are enlarging it, especially if you feel like you might not be dead on when you check with the L track...
Is your L track from AdWagon?
It has those two extra grooves on the front side - looks like the ones I got from USCargoControl - I thought the AdWagon ones were totally smooth ?
Did you relieve the back of the L track to account for the head of the rivnuts, such that the L track sits flush against the van walls?
I used a 5/8" or 3/4" end mill on my drill press to relieve the back of the L track on mine.
I also didn't use EVERY hole in the L track - that might be overkill for our purposes...
Every other hole on my verticals - the ones that hold the bed
Every 2 holes on my horizontals - the ones I use to strap cargo to walls