Looking for pictures, description of your strong back support. Mine will need to roll around in the shop as I often jump from one project to another and this canoe is petty big. I have a concrete floor that is not perfectly level and my current plan is to weight, lock cart down to get all my levels and first several strips on then move as needed, problem? What I'm getting at here is after stations are set level, plum and square and locked with first say 15 strips and I move it to a new spot that is no longer level that won't be a problem? Thanks for your time.