Dave,
I'm a little split on the Balance bar it comes with an adjustable on the fly one and if you don't use it you can lock it with a couple nuts. But the adjuster knob is separate. I haven't yet ordered that but it's not really expensive either. Just not sure if I will ever use it but would've neat to have.
But image type that says if I add it and never really use it then it's waste of space even if it looks cool.
If was a race car it would totally make sense but it will be 80% of its time street/ daily driver the rest I might get a chance to escape for the odd weekend and run it on a hill climb, drivers training or auto cross. There it probably would make sense.
Dave what's your experience would you add an adjuster knob to the pedal cluster?
Even in race cars where we have them, we're rarely adjusting them. You're never
really going to adjust it on a street car, beyond the first two setup days. You do some dry pavement tests and set the balance so (ideally) both front and rear lock up at the same instant. Make a note of how many turns from one direction you set it at. You then do the same on wet pavement, where you'll likely find the fronts in the beetle are locking up before the rear (opposite of most vehicles). You then divide the difference between the two settings for your "everyday" setup. Are you
really going to turn the knob on rainy days, or will you just adjust your driving style? I doubt you'll be taking it out in the snow, so a winter setting probably isn't needed. If you're going to track the car, and you have the track layout memorized, than yes...you can dial your laptimes down with some brake adjustments. BUT, if you aren't consistently hitting the same line, every lap...you'll never notice the difference.
Based on what you've said regarding your planned use, I would probably spend a couple hours setting up the dry and wet braking via the bolts, and not worry about the knob. I didn't even put a proportioning valve into the rally bug, as the suspension setups I have for gravel, snow and pavement adjust the weight transfer enough that I don't really need it. I'm not going to notice the difference between one click or two, so I might as well focus on my overall driving technique instead.
My next build (GL) will likely have a knob, but I know it's not likely to get used very often at all.
HTH,
-Dave