A link to some pictures of my sons new shop, 1800 square feet with 12 foot sidewalls. Two of the pics are video of the rafters going up using my 5040 Kubota and my homebuilt tractor. The homebuilt has a cage on the back we only use every couple years but it certainly works nice. If you watch the videos do the second one first then the first one as they are out of order. Once we got a system going they went pretty nice.Flickr: Alan Gage's Photostream