Thanks all.
As to where I keep them that is becoming more of a problem, small ones in a display cabinet, medium dotted about on shelves and the larger ones taking up a few window cills but space is running out. At least the vertical designs don't have such a large footprint.
I'm having thoughts about giving the James Coombes a similar treatment. Would get rid of the box bed and outrigger. More decorative base and entablature in plate of the plain steel plates, maybe a larger flywheel and some more interesting columns for starters.