Overflow Spacer and blockoff

This is a shim to keep the metal overflow plate from pressing against the tub. It also functions as a block-off plate for the overflow hole since we are not using the overflow drain.

When using the overflow plate we realized that the metal plate was pressing against the side of the tub and was eventually going to scratch as well as allow leakage from the overflow.

This was made with PLA, but I think a print made from TPU would work even better as far as sealing