I did not intend for this to turn into a bash of the UP6. I think it is a good brake valve. Mine worked well for a couple of years before developing a problem. My point in mentioning the UP6 is that any of them can have a problem. If a problem develops, hands down the SS is the simplest one to service.

Some one mentioned a Trim valve. I forgot that I also have one of those, but have not used it. If I were having the kind of trouble with the SS mentioned here, I believe I would have installed it by now.

I think my equipment does get more of a workout than most because when the Miss. Gang goes jet flying, we fly relentlessly. I simply like the way the Smooth Stop works better than the others. Any needed maintenance is easily and quickly performed at the field if necessary. I do hate to see a good product get bashed by a few people who may not have had as much experience as we have had. There are eight of us in the Mississippi Gang who fly, including my two sons and Rick's two sons. That is eight of us total, and we have a LOT of jets. They all use the Smooth Stop, even my non BVM jets. If we had the kind of problems mentioned by the few comments here, we would have changed a long time ago.

Best regards to all.
Dennis