[Nick3092]

I have the original mounting hardware on mine. There is a 3/4" diameter rubber washer about 1/4" thick on the sleeve and that's it. The sleeve and screw go through the cabinet hole with no grommet and the washer keeps it from pulling through. The chassis just floats on the four rubber washers and the sleeve and screw just keep it from lifting off or sliding back.

I had a bit of a problem with the washers from RR. They seem to be very soft and compress too much on the heavier end with the power transformer, so the chassis tilts lower on that side. Placed some cardboard under that side of the chassis until I come up with a better solution.

Thanks for the info on the rear screw. Interestingly, I have the exact opposite issue. If anything, my cassis is sitting slightly higher on the transformer side. At least based on how the shafts are coming through the front of the cabinet. My on/off/bass shaft has a bit more clearance than my selectivity/treble shaft on the non transformer side. The band switch shaft is almost perfectly centered. The tuning hub is sitting pretty low in the bezel. So I think I actually want to raise the front of my chassis a tad. But it's not making contact anywhere on the wood bars going across the chassis. To the naked eye, the chassis appears to be the same height off the wood on both sides in the back. I didn't get out my calipers to confirm though. 

I know Ace Hardware has a some thin rubber washers that are probably pretty close to the same size as the chassis washers. I bet these would work well to shim the chassis washers on the front of my chassis, and the transformer side of yours. They could probably go right under the ones from RR. Gotta be better than shining it with card board.