They are great cluthes. They will absorb side loads, which many on the other brands will not because they have plastic housing.
I replaced the ones on my Hunter Vision 36 with the new models. The original ones only had single springs, the new ones have dual springs for each unit. I was also going to replace some of the handles. It turned out that it was cheaper to purchase new ones verses updating the old ones.
Bill, Mark, Guido and all of the gals at Garhauer are great people.
May I suggest that you purchase them on the SBO website to support the cause.