UO Spiders

Can anyone tell me how good are the UO Spiders. Are they easy to adjust for collimation? Do they hold collimation well? Do they have any vibration problems? They are much lower in price than some of the other manufacturers, but you usually get what you pay for. Thanks.

I see your message is about UO spiders. May I suggest discovery as a source for your spider. I just bought one and am very pleased with it. I do have one problem though, its a tight fit at the point of adjusment. A very sturdy and strong unit. Its a four vien with four adjustment points, not three as in most. Very thin viens. Produces stars with the four spikes but only on very bright stars. For thirty dollars I think its an outstanding value. They shipped it to me here in Fresno in two days. I also bought the holder which is a perfect fit.