Thanks Liam. I wonder if there ever was a four legged version back in the old days. Not only would it have been unstable on an uneven floor which would make getting consistent results difficult, a fourth leg would have just been more work and made the wheel more costly.
Aaron did a model of a different wheel in his live stream yesterday. I decided I'd have a go at it myself. A few parts left but it's close.
https://live.staticflickr.com/65535/49000551778_1fc6423e93_w.jpg
A close up of the flyer and bobbin assembly. Still needs hooks on the flyer.
https://live.staticflickr.com/65535/49001299282_b927ac33cf_w.jpg