I have the gracie pro wooden frame..my husband set it up for the king size..i wish he had not done that. a twin would of been big enough for me..maybe a full. I had a juki on it also. it takes up alot of space! and i don't belive you can upgrade to a bigger sewing machine on my frame.. I got mine from Kathy quilts,she has a website and a store front on ebay. great customer service.
I don't use it anymore, because of my physical limitations..sold the juki,(really wish i had kept the juki now..)and i am selling the leaders. this spring i may sell the frame and the rest of the stuff i got with it...:(