So you want the low speed bleed to help with fork dive under brakes? What does the Traxxion needle achieve?
I would love to get my hands on some stock pistons to see if they can be modified for more flow. Then just copy some of the custom stacks for the F4i forks.
The low speed compression is intended towards road surface indulation tuning, just like the low speed rebound is, both being low velocity chassis reactions to non bump road inputs.
It's a fairly fine tuning aid.
The Traxxion item is still a broad enough spectrum needle to allow for mixed use while still getting decent fine control.
Other needles exist that are narrower band in terms of range of control, but with finer adjustment.
Dial in the screw enough to take away brake dive, and you will have far excessive damping for road input energy.
Frankly, a 919 properly sprung with 125 mm of oil height that has a front brake savvy rider at the controls, is not going to bottom out the forks, even hauling down hard from top end to end up down 3 gears or more.
You can get some anti-dive benefit by using the compression needle, but that is a very secondary intention of the low speed compression adjuster.