nubo,I purchased my X4 directly though Summit.As allways with Summit,an excellant stand.After trying it out a few times,I decided that the Rapid-Climbers and my size 14 boots were'nt getting along.So,with a little bit of fabrication,I re-installed the same straps(purchased from Summit)that were on my old Viper.Now,I've got the best of both worlds...Bob Summit--1-800-241-5559