Hello everyone. First time here, just bought a CY3800 and am (not so) patiently waiting for it to be delivered. Here is my question. How tall is the rear door opening? I have a highly modified club car golf cart and am trying to be proactive. If I have to do something to be sure it will go in, I want to have it done before the camper gets here. Could anyone tell me the exact measurement? I cannot find it anywhere. Thanks a lot in advance. Marty.