My wife has the Kubota modular hard cab option, V4311, for her RTV500. She absolutely loves it. It is VERY easy to put the various components on or pop them off. She always has the doors off in the summer, and sometimes more but not too often. She normally leaves the top, back window and front window on and just uses the pop-up feature of the front window when she wants it more open. If the cost is not an issue for you, I would HIGHLY recommend it. I think you should be able to find them offered on-line for about $3500.