This is my third Large Rock hex set that is composed of two tiles. This one is a bit taller that the previous two and does not have a nice sloping ramp to climb. It is compatible with all of my other Modular RC Course tiles. All my hexes are designed to use 4x6mm round magnets, they just push into the holes (glue may be required). It also has a 3d printed keyway that reduces or removes the need for the magnets.
A blank hex template and keys are available for free.
This one is very close to 256 at the widest point, it can be scaled to whatever size your printer is and should not cause issues. Just remember to scale them all the same.