Ed Greshko:
I've basically been following, yet ignoring this thread. As the amount of words make it difficult for understand the network topology. It would be correct to say that I'm lost.
I've felt the same way, I think this is what I can figure out: https://www.youtube.com/watch?v=cl4cn_lx6Mc
His internal network seems overly complicated. Any time I've tried double-natting as an experiment it's hit and miss whether outgoing stuff works without pain (e.g. browsing the web), but I've never tried letting something through in the other direction.
I definitely get the impression it'd be easier with one less router.
I kinda get the impression it might be easier not trying to get a PC inside the LAN to use an external IP, just having the router accept the external address and forward it through to an internal IP (I've done that before, as a way of letting someone get a very large file from my PC). It all depends on how fancy his webserver is going to behave.