Has anyone scaled up a Mendel90 to 300x300?

I'd like to build a 300mm x 300mm printer. Maybe 200mm of Z. Anyone scaled up a Mendel90? It looks like a great design.

It looks like the MendelMax 1.5 can do that size fairly easily. Is it a better choice?

I know smaller is better but I'd like to print some extremely large gears. Is this size something reasonable or is it going to be impossible to keep such a large bed level?

I apologize. This topic was mis-posted. It should be in the general forum.

even though misplaced, I have printed an A3 size mendel90 for my laser cutter project. all scaled nice even though i never constructed a Z axis