Ok, I picked up a trail sl 29er 3 for a killer price from my lbs. I love the bike, but the rst Duce is heavy and needs to go. I also have a rz140 with a lefty on it that hasn't seen any use since I got the 29er. My question is: does anyone know any reason I can't put the lefty on my 29er if I install the spacers to bring the travel down to 100mm? I have access to a great replacement for for my rz for a great price which is why I'm thinking about making that switch.