Your side beam is going to be caddywhompus since it is not level. How bad? Not sure. Also, the wiggle in the bracket may cause some distortion. How bad? Again, not sure. Take er out, take some screen shots (not with your phone but with the unit itself) and post em up. You'll probably be able to tell whether that system will work or not after your maiden voyage. Personally, I'd get it level and eliminate the wobble BEFORE going out, but I'm OCD when it comes to installation. If the manufacturer says make it level, I'd make it level. If it says it needs to be in alignment with the boat, I'd put it in alignment with the boat.