We got my wifes RTS on Jan.5 on the 6th I talked to Bob at utopia about a backrest for the RTS he is waiting for someone to send a seat for prototyping, we live in Southeast Texas so I was hoping someone in a more hostile winter might send theirs first,my wife has 3700 mi. now and does not want to part with her seat for a couple of weeks [shipping ]. Bob said in on monday ,out by monday. My wife is going to Japan to see our first Grandbaby be born on May 21 if no one has done it yet I will ship ours then,I told Bob I would buy the first production model.I have one on my Venture and both of my wifes previous Goldwing trikes, they are great ,finest backrest on market in my opinion, if anyone decides to prototype please let me know so I can order the next one , if not will in May.