It is. The settings are trial and error and rebuilding your lines can be scary trial and error.

I still blame the proportioning valve and the work that was done associated with its installation for Corey's dramatic brake failure, which failure cost him the H2 championship for '03.

Back when a bunch of us were autocrossing Porsche 914-6's (damn, I'm old), it was very easy because the Porsches came with an OEM proportioning valve and after a while it was circulated among the cognoscienti just how many times you had to turn the screw for the brakes to be perfectly balanced for four-wheel lockup w/a 200-lb person in the driver seat, 1/2 turn on the torsion bar screws and a specific spring set in the rear, and Konis all the way 'round.

There doesn't seem to be any such detailed information available to Honda drivers, and unless you really know what you're doing, I'd consider it more dangerous than it's worth.

IMHO, of course, and without knowing anything about your mechanical expertise and what kind of car you're driving.

In Corey's case, he was slowing a 2600# Prelude from 148 to 45 to try to make Turn 1, so perhaps it seems relatively less dangerous on a 50 mph autocross course...but it still sounds scary to me.