The best stand that I have found is a Pedros stand. It reduces the force while clamping, but also have a different shape head. Most heads are round, but the Pedros seems to fit frames with many types of shapes much better!
(and I've used the other brands for many years!) They offer a consumer stand called the " Rockstand Portable" and the single and double Rockstands for shops.Check out thier website:www.pedros.com

Good luck!