I've been following the scale debate for some time now, without an axe to grind one way or the other, some aspects apeal to me while others do not. But I have to say, you almost make a believer of me, even with just what you've shown so far! FWIW the difference in the size of the turbo lift interior with the external diameter of the shaft seen behind the bridge dome, might be explained, if we assume a triangular 'inner' buttress between the outer larger diameter shaft and inner smaller dia. T/L, like we saw in ST:TFF? When I first saw this, I was like, WTF? but then, after seeing how Shane Johnson put the idea to good use in his proposal for updated plans, I realised how much sense it made, allowing as it does, for ladder wells in the "corners" while reinforcing the intire shaft. Anywho, it's something to think about, Keep up the good work!