I think one of them mentioned a little bit about the engine (maybe not by name), but I don't remember which.
Davioware: from the testing I've done I don't foresee much of a problem.
Apart from the practical problem of whether I'll copy it precisely, making the whole thing flat, or make the cliffs actually vertical and have ladders you can climb. Which would be neat but I'm not sure if I could make it fit together.