Designed in Tinkercad, this is a simple 20mm x 20mm stand with a cross or "groin" vault bottom. Printed vault-side up, should come out nicely. Cross vault: http://en.wikipedia.org/wiki/Groin_vaultReminiscent of Wajazn's relay board mount: http://www.thingiverse.com/thing:4106Tinkercad file: https://tinkercad.com/p/acc0019a5f672961Print it out! Edit the Tinkercad file and re-export the STL to your needs. Get your Roman Empire architecture on. STL file should already be centered and on z-plane.