Re 2 ports in front housing, Are you refering to 2 optical ports in the picture (picture from Nexusamerica.com) ?
Yes, I think the question of upgrade depends on whether the holes for the ports were cast as part of the housing or drilled afterwards - my guess is they were drilled afterward - which means there is at least a
slim possibility for an upgrade - from a good machine shop or by the manufacturer.
Re control buttons in backplate, it sound like you need new back plate with control & I think
you can buy them with $$$ & replace by yourself too.
Yes, but the backplate is not the kind of part that dealers carry, that would have to be obtained from the manufacturer. When I had to have my Ikelite housing serviced, I sent it to ikelite, the same was true when I had a problem with an Olympus flash housing (they're not very sturdy) I sent it back to olympus. I would prefer to send my Nexus housing to Nexus - just call me superstitious. While I have found the Japanese language website for nexus - with a Japanese address and phone #'s I could not find an e-mail address for the company. Thanks for the info, is there an e-mail address on that manual?
Mitch Berger