@Mytran - thanks
Here are hopefully some better views as to where I put the Doomsday Machine entrance (basically 1 deck above Journey to Babel). The flight deck ended up the same length the first time I tried it but now tapered (like the forced-perspective deck). I've shortened the length of the hangar deck though to see if I can make some more room and added a cargo entrance for the flight deck's front wall following the idea from TMP
@Wildstar - That red pole is a divider for a red screen wall. You can see it better in the HD version. Interestingly, the wall angle behind it matches better with the corridor angle aligned with a tapered flight deck.