I had the Bimm 2000 combi system when new..not precise--not so good. Eventually I turned the s.s. tubing "stirrup" around 180 degrees in front of the mast and used it for the diamond wire tensioner. Worked fine at 10:1 downhaul.
Later I got several aluminum or s.s. stirrups off old aluminum A-cat masts and used them on CF masts. These old designs work just fine, even better with tiny double bullet blocks and small line. But larger triples and quads are a nuisance in small spaces- do not use them.
9 inch long x 2 inch by 1/8 inch thick aluminum plate works fine- 2 pieces bent into a shallow Z, lightened by drilled holes. None of mine ever broke.... except the first one when I went out in a blow, when two very old, poorly-fastened rivets in the downhaul DID come off the aluminum mast..... Twang-CRUNCH... Splash.
Yeah, I'm not so sure I want everything combined - rig tuning isn't that simple!
I saw one setup with a single line coming from the yoke into the base of the mast with a bunch of internal purchase - very clean but the innards were a bit mysterious. I'm most uneasy about how to attach things to the carbon mast and what kind of loading the attachment points can handle. Most fittings are riveted to the mast (and it's 7 years old) so I guess that's acceptable. 10:1 sounds like a lot of purchase if you had a lever-arm on the diamonds - did that include the leverage of the arm?
