No worries, Psion! I've been having some rethinking over the last little while myself. Not necessarily going to chuck any of the stuff done to date, but there will be tweaks here and there.
Take that cockpit-as-lifeboat idea earlier on. I may want to...appropriate that one. Also, wondering about how and where to place the stairs, turbolift(for cargo "dumbwaiter"-style, maybe? Or crew accessibility?), and so on.