Thanks Bodgey they look like they could work
Now I know that 1. such things exist, and 2. what they are called, I can hunt around and find the best ones suited to my table. Might be a faff though lifting the table on and off them, as it would still be a dining and sewing table in between cutting out sessions. My table is quite large and very heavy so I daresay that it might be a 2 person job, either that or risk putting my back out doing it...
I'm looking forward to trying some out. I had been wondering about making wooden blocks to sit the table on, but these things look like far less hassle.
And cutting out should be a much sweeter experience