Generic record platter coaster

This is a remix of https://www.thingiverse.com/thing:2407178.
I printed one of them and although it turned out OK (see photo, upper left), the "grooves" were rather small and prone to collecting debris that could be a bit hard to clean out.
Also, I typically run a 0.5mm nozzle and super fine details can be slightly difficult to achieve.
So I designed this one with 2mm wide grooves and troughs which are very easy to clean if you ever need to.

I also designed it with a 39.5 mm (~1.5") diamet