Spades posted:

Also today I received my set of cheap rear end Chinese rivet nut pliers, which do the job excellently for something which costs a fourth of the price of an actually good set. While I wouldn't trust them for stainless steel rivnuts, they are perfectly fine for the aluminium ones.



Really is no replacing rivnuts for putting threads in automotive sheet metal - both super useful for blind holes needing tapping but also just saving yourself having to set a weldnut on a painted piece of steel sometimes too.

You can see in the previous update that a bunch of the zip tie saddles have been installed with a bolt going through them and the rivnut, which I have driven into the old hole that used to house the plug ties. Conveniently, the 5mm ID rivnuts I have seem to have just barely over a 6mm OD, which means they squeeze fit with a bit of taphammering and fill the hole with no play at all.