Very interesting! All I can say is good luck because the way our headlights are set up, its really hard to get creative in there and make stuff fit.
If you are doing all that work on a customized headlight like that, then dont go with Hella 90mm. You should go with more of a Valeo or Stanley (TSX) projector yet using the hella 90mm in ur highs. Or you can go bi-xenon using just one projector, there are endless possibilities..