Daveydog
Good on ya. We at The Robert Axle Project have developed a full line of axles to address this issue of 12mm thru-axles on most major brands of mountain bikes in terms of mounting BOB trailers. Wish you well and hope to see you on the trail!
http://www.robertaxleproject.com/https://www.facebook.com/pages/The-Robert-Axle-Project/131931253663625?fref=ts