Washer for Seestar base between wide tripod head & Seestar S50

When using a Seestar S50 with a tripod that has a wide head, you might need to elevate Seestar a little bit b/c of the four rubber foot pads in the corner of the base. I made this 3/8" (10mm center hole) washer 2mm thick and that was enough for my Seestar to clear the tripod head when rotating.