The past couple of days I have been working on securing the wiring behind the instrument panel. I have a few aches and pains and bruises, I'm definitely not designed to be under an instrument panel. I have some larger cable tie saddles which have a large 4.8mm hole and I wanted to secure them with a 3.2mm rivet. I used the drill press to file down some wide 3.2mm washers to allow me to use the larger saddles on existing 3.2mm rivet holes. ( washers,11.8mm wide down to 10.8mm wide ) Photo 2. Left side washer original, Right side washer filed down and fits in saddle.