It does not matter if a Tempest cab is a bartop, upright or cabaret, they always look awesome. That being said, this is a very nice build, well done
I agree with you on the vesa mount nightmare comment. I am currently thinking on how to do this myself and with my screen: the vesa mounting holes are not centered with respect to the screen, the bezel around the screen has a different thickness on the bottom, top and sides, the back itself is not flat (there is a hump)