Hi PDron
The Hiccups were very minor ie a screw short in kit and Instructions missing.
Both were brought very quickly to my attention by S&S themselves.
Instructions sent by e-mail and replacement screw found in my tool box. Slightly more bothersome was the metric cap screws holding on the old backing plate in an imperial threaded hole!!! Luckily enough of correct thread left to hold the new correct screws

Otherwise it was an easy DIY job