The mounting stuff they sent when latched together and all the panels on it , it does become pretty stable. I didn't like the angle and because of trees had to get it up much higher, without being on the roof. Once I get a non-rainy weekend :-O I'll be reinstalling it up there with the "city approved" second set. I too am not using the "box" as a controller, but noting more than another PDU, Power Distribution Unit. Ghurd's controller can also be used as a LVD :-) I don't have mine dialed in yet, work keeps getting in the way :-/
Hope this helps; Bruce S