Saying Hi

[TMo]

I'm not an N-gauger myself, but it seems like that is enough space to do something substantial.  I like the lower-level storage idea.  Mine is approachable from two ends of the layout so that I don't have to run loco consists back to the tail end to bring the train back out of storage.  Maybe on the two ends where you're turning back onto the shelf you switch down to the lower storage level.