Customizable Stacking Loading Block V3

Further development is in V4 https://www.thingiverse.com/thing:5418495.

This is a customizable reloading block. This is a remix of Customizable Reloading Block by Jonathan Maia https://www.thingiverse.com/ambulancedriver2/designs.

New Features:
- Text is on 4 sides.
- Stacking is achieved with a raised top rim and a recessed bottom rim.
- The maximum hole diameter is increased and the hole to hole spacing changes from 15 mm to 20 mm if the hole diameter is 13 mm or greater.