They look really well built. I had some compbrake mounts on my 205 and they were mickey mouse compared to these! They have needle roller bearings on the top spring pan so that the rose joint isn't forced to rotate, reducing it's load capacity. Even though mine are used, they look very well made. I've enquired about the price of a pair of new rose joints. It's not 100% essential but one has very slight play and I'd hate to have to take them off again.
Stock piling a fair bit of gear. Keen to get it all on. Just need to find some time...