Does the Add-A-Motor come with good instructions? I'm nervouse about constructing the dor and having it work properly. I like the idea of it being solar powered, but I doubt I'll go that route. What happens if it is cloudy? Or snows? I just want one that runs on a timer, keeps them safe, and isn't too loud. I'veseen some that are very loud, and I don't think my neighbors would appreciate that at 6am. Add-A-Motor didn't seem as loud as some of the other ones in the videos I've watched. Think I'll be purchasing one, but I just want to make sure I know how to use it..lol