I once (might be a decade or more ago) saw this huge dungeon project by (I believe) a German guy, who did this with 30x30cm modules. He also had a huge chamber one measuring 60x60, and an L-shaped one as well, but everything was modular and had entrances on all four sides (the 60 ones had two, obviously), which could be closed off if he so desired. He had a huge table filled with them and it was glorious. I've always wanted to emulate this, but lack of access to lasercutting equipment has held me back from starting on it.
Your modules remind me of that, but still have a completely different feel to them. Also, the modules are decidedly smaller, which has both its pros and cons I suppose.
At any rate; they're looking absolutely great, and I can't wait to see a full table's worth of them
