Update to 5/15: Still a great investment. Got backrest in 2013. Easy install, mount and adjust. Iâ€™m 6' 4" and getting fat. See my WS gallery. Backrest adjusts to me fine.
As an Iron Butt member (go far and fast) I love this backrest. I use it on rides more than 200 miles round trip. Ha, just getting old. â˜º For long trips suggest this backrest, Air Hawk seat pad (no seat heat needed) and Mick-O-Pegs. Yea, a 1000 miles in 24 hours is a very easy!!! Liked your favorite chair.
Rust? For chrome to rust there is serious abuse. Have had my seat off many times, (change air filter, center shelter off, electrical additions, etc.) have never seen rust on mounts. On the twist attaching a little light lubricant is advised.