Thank you, SP, that's very kind of you!
It's still work in progress, but here's the latest layout...
The ali tube and connectors are cut down from a fruit cage we bought a couple of years ago, when we thought we needed more protection. After much 'humming and haaing', it wasn't what we wanted, and I was kicking myself for getting such great stuff and not using it for something else - hence the GH staging! The shelves are just watering trays, supported on a few timber battens, clipped (with the fruit clips) to the tube, and can be shifted around or even taken off if we need something taller to grow there...
It meant that I could rebuild the wooden staging we've had for years, and is still in good nick, hence the partially built shelves and workspace at the end, next to the water butt! The plastic shelving is only used as a temporary measure when hardening off outside etc, and at the moment, is pretty well redundant, but will be useful soon! (I hope - if it ever gets any warmer)! The toms will go along there, in pots and trays on the floor.
Last night's thoughts were to get rid of the temporary fly-away GH you can just see outside, as it's so ugly there, and the zip's busted, so maybe a new layout in its place, using the cover much lower down on these plastic shelves outside could get all that sorted...
(Just noticed that you have to lie down to see the staging - it was edited, but didn't seem to work - I'll have a look at it again!)