Center Aid

Inspired by Mobilow's Center Finder (Thing 672343), which is very useful.
I was missing the parts he used, so i created a similar design.
Added two slots in the middle part to draw aid lines.

The screws are 4x M3x10mm hex an 2x M3x6mm cross.
As counterpart i used 4 spacers used for mainboards, normal female scres should work fine too.