I saw this at a retreat and took note of how it was made. My version uses 3 FQ, but that is for a standard sized sewing machine. This is a great way to keep all those essential tools near to me when sewing.
The sewing machine sits on the main part of it which helps with uneven surfaces and eliminates vibration when sewing.
The hardest thing about making this is sewing the plastic. I have since bought a a non stick foot (#53) which does help.
When not in use it rolls up. This is the prototype and I soon learnt that the ties need to be in a different position to have a neater roll.