That thing with the overlap is very interesting. The point is that with PhotoWorks things are not so easy, if I overlap in PhotoWorks the outcome is not good. So that's why I use the gap.
I reccomend you to download the model in my website, so you can check all the details.
(Sorry, but now I have a lot of things going on, and the time for me has become "fugitive").
Oh my God! I did no see your post until now (I was very busy!). Sorry.
Very nice work!.
I think I used plastic too.