From my experience (back when i could ski 35) the line length was a significant factor in endurance. That being said that is relative to one's max pass. But I've seen skiers whose max was 15 off who could ski a bunch of passes every day, so I kinda think 35 and shorter may be where it begins to be a factor.
Great, but can it be used on other brands? Is it patented or will other mfgs start building these?
How small are the adjustment increments?
I guess @Horton will have some of these answers soon.
I could never get everyone to share a boat. In the early days of our private site all the guys that I skied with had their own boat and still liked to hit public lakes occasionally. So, it remained that way.
The last 2 Malibus that a local promo had were, even according to him, horrendous at 15, and 22. Not my words. I never skied it. Last tourney at their site, it just sat on the trailer.
Along the l8ne of what @JackQ said, my new ones just aren't the same as the old ones, Fit just not the same. Rear "tongue" has to be placed (forced) in between overlay flaps.