Frame connectors US Cartool need help.

I agree with the above post, definitely since your car is a convertible and prone to body flex. It is best to have it sitting on the wheels. If they do put it up on stands it sould be supported at the rear axel and front lca's to simulate a wheel load. They would also need to be sure the stands are at the same height. The last thing you want is to find out the door doesn't close properly after having them installed.