Having owned a very early Joplin (literally in the skip), for a few years and now a Reverb… I think that the DOSS post has missed the point. The technology has moved on:
1. Cable vs hydraulic. The cable system needed greater maintainence due to rusty cables. The pin to actuate the system on a Joplin needed a certain clearance under the saddle to work. Only certain saddles had high enough rails. Hydraulic, sealed from the elements, once bled, forget mostly.
2. The cable operates the device from the saddle clamp area and the cable moves. granted this happens on my Reverb but surely the way forward is to have the cable entering the post lower in such a way as its static when the saddle drops. Thinking there was a hydraulic post with the line coming from the post base.
Then, £350 for this and its gone backwards imo.
R