Summary

2D flatpack version of DaanDruff's tree stump design. Meant for ease of storage and transport.

The fit has built-in tolerance to accommodate lower quality printers, large diameter print heads (tested up to 8mm), or thick layers (tested up to .32mm) without concern.
If you want a tighter fit, print at 1.25 scale on the Z access (And ONLY the Z access) so that the pieces are thicker but not larger in the other directions.