I ended up making myself a mobile wing stand frame, as I am building the wings in my shed at home and we also have the family car in there as well. So the dilema of mounting a couple of posts from the roof wasn't an option. so after searchng the internet I found a builder who had made a mobile trolley and I thought what a great idea. I made mine from square 90mm posts with some angle iron on the top, very sturdy, with some wheels on the bottom. A piece of allthread rod in the middle which I adjust to take out any sag.