Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5000803.

This is a simple waffle grid for various hobbies. It's available in 200, 250, or 300mm sizes as well as a key to connect grids together (with a tolerance of 0.3mm). It also includes a half key for plugging the edges that are unused. It should print no problem with whatever machine or filament you use (provided of course that it fits on your bed).

Let me know if you have questions.