... it is a trim strap after all, not really a depower strap. i use it for different reasons, i guess.
Good point concerning the convenience of "zeroing in the sweet spot", by using the trim strap.
There is an "adjustment" solution, and the principle behind the solution was demonstrated about 3 years ago, by Ludo Zeeko. Here is a picture, posted at the time, in the following KF thread:
...and this picture shows the basic components of the "trim" system, which are located above the bar, at the "Y" of the two front lines. When this system is used to lengthen and shorten the overall length of the dual "power line", then, there is no need for any kind of "cleat" or traditional power line adjuster.
I have been using this "Zeeko" depower/trim system ever since it was presented by Zeeko, in 2012, and even though I originally added the "Prussic Ball" as described in the thread...I have since done away with this addition, and now just reach up above the bar and grab one rope or the other to power or depower the system. The simplified technique I use is to first identify which of the two power lines I want to pull on, and then, glide the board toward the kite to release tension on the power lines, as I pull on the line. It takes a little bit of practice, but is not hard to do... the action is just like a kiter usually has to do in order to adjust the power line, with the conventional use of a toothed cleat.
The combination of this "Zeeko" style trim system along with the use of a small release shackle gives the rider a very "clean" bar without the clutter of a cleat (above or below the bar), and without the bulk of a chicken loop, and without the hazard of a spreader bar hook, and as a bonus, it gives the rider an extraordinarily long "throw", located at a very convenient distance from the kiter. I would like to see this type of a control system perfected to eliminate any flaws, and made available to the large group of kiters who do not perform unhooked riding.
Here is something else to think about: Even though most kiters have long enough arms to deal with the arguably "short throw" available conventional kite systems, wouldn't it be nice if that extra 6 inches of throw, located close to the kiter's abdomen, which is presently not being used... could be made of use to "back-stall-DRIFT" a kite... kind of like adding lower gears to a mountain bike. Maybe we can pull some kite designers into the discussion... ask them: "what could you guys do with an extra 6 inches of "throw" to improve basic kite performance?"