BOTR has several who have S-1 plans, plus Pat Johnston has a OTS legal "Lite" version that out flies the box stock ones. No dimensions or airfoil changes, just some tweaks to the construction. Once built there is no discernible difference from a Sterling kit S-1. Plus, Pat can laser cut you the ribs at a very very competitive price. Or a complete kit..... The biggest "change" is the "molded" LE which is a direct copy of the "unobtainium" solid LE material, yet they will float off the bench if you don't weight them down. If you build one of his "Gold Kits" over 21 oz, you done something wrong! LOL!!
Eric Rule has an awesome kit, also, and I "think" Pat King cuts ribs and maybe a full kit for the S-1
Not sure how the ones other than Pat J's are as far as the construction of the LE. Pat J's is molded using laser cut formers and foam then the sheeting wrapped around it. SUPER light and strong, and the same "final size" as that piece of 15lb mahogany that Sterling used to try and pass off as a balsa LE! LOL!!!!
Big Bear