Customizable calibration board

Hey guys.

If you're a FDM 3D printer user, you will offen find tolerance between printed real things & original design, which is really annoying especially adapted to screws or other things.

Maybe only solution is to print a series of shapes with adjacent size to calibrate.

Here I present a tool to make this process easier.

With the cutomerized Scad files, you just tell him:
- You want generate suqares or circles(2 shapes most used)
- Size range(Which size & differeces between eac