I think even with the improvements since the model stonysmith linked you, it still comes out a bit dark sometimes. But, with my models, it's actually been fairly accurate. I would recommend you do a test piece for yourself though.
How big is the piece you're drilling? I wouldn't dare drill in this material though; I've put my own models through some stress and I know they they do snap rather cleanly when broken. For instance, a leg of the model can snap off (when dropped from a height, by accident), but the break is so clean it can be glued back together easily, with barely any sign it's been broken. Again, something to test maybe.
Regular superglue, as mentioned previously, has worked fine for me connecting broken pieces back together. I'd imagine it would react just fine when attaching something of a different material as well, so long as that material worked well with superglue too.
I've seen an example in the last few months of a rather thin FCS print that was fairly semi-transparent (can't seem to find it at the moment, but it was a shell fossil I think). Again, this is something you'd have to test with different colourings and thicknesses of the piece in question.
I've tried not to get my models wet, but I'm sure if you take the proper precautions to let it dry, it should be ok. Should probably test this myself at some point.
I can personally vouch for this, they will print, so long as the model is combined into one. For instance, you can have a model with interconnecting meshes so long as they are actually interconnecting and not just near each other, but you would need to combine it.
If any of this helps, fantastic. If you want to know anymore, ask. And can I just say, I've seen your work around, and it's really quite inspiring on how you've made some of them.