I'm not sure I see any space being allowed for insulation and what about temperature control in the helix area?
I can tell you from personal experience that temp and humidity extremes will play havoc with the track, and with limited access, it all could be a recipe for trouble. Something to think about now rather than later when the track gets all kinked up in a hard to reach confined space.
The box is just a tool. It isn't for anything other than a "ruler" to measure what clearance there is going to be when the helix is complete.I haven't a clue as to what I'm seeing here..You built a helix. OK, but what is this box for ? How is this employed in staging and in relation to the helix ? Is this a cassette of some kind ? M
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