On my 2007 bike I installed Rainey's hydro clutch in 2013, as the clutch wire snapped and I wanted to get rid of being stranded on the road because of this problem.
Since then the clutch worked well.
On the board here it happened to me to see some pics of the hydro clutch slave cylinders mounted on other bikes and it seems that my slave cylinder is different.
For example, this is a pic of mine cylinder (left pic) and a pic of another one (right pic), taken here on the board. You see that the oil hose connects to the cylinder differently?
Do you know if Rayney improved the cylinder design over the years?