You know, I did a 3" square block, scrappy king-sized quilt for my DIL and son. It's still on their bed, but I thought it would drive me insane by the time it was all said and done. Your postage stamp is beautiful, but -- may I say you are crazier than me?!
A tumbler is something I'd love to do if I could ever get caught up with dangling projects. Darnit, people are waiting on them and I have had no desire to sew for the last few weeks.