Clay Sips put me in touch with a man who had put kits up for them, he came up for 6 weeks and his experience was invaluable , I got some local labour and I assisted, 4 men for most of the build but I got more people the day we put the roof on, it worked relay well. We went to see Clay Sips before we ordered the kit and they were great, we did get some other quotes but there was not much in it, one company wanted to have vaulted ceilings in the bedrooms but I thought this was a huge waste of space, I have about 80m2 of usable loft.