I did a lot of looking around and was ready to buy one from Accessible Systems. They have very well-engineered products. Just happened to find one locally that was 3-years old and is made by Auto Twirler. It is sturdy, strong, well-built; only problem is I cannot get my convertible balanced properly on it, but it is close enough and it does lock down at any angle, so it still works great. And no more laying on your back, man is that great!! If I hadn't found that one, it would have been a model from Accessible Systems; their units have T-bars that are infinitely adjustable for balance. But more $$ than used, of course. Hope that helps.
