My car is mostly a track car, I really only drive it to/from the track. I had considered this upgrade for maximum performance during my 420R build last year, but decided to see how the stock setup was. I found it a little over-braked in the front, but upgrading the rear pads to DS3000 has pushed the bias rearward enough that I am happy with the braking performance. However given my recent issues with interference between my rear calipers and watts linkage arms (https://www.caterhamlotus7.club/forum/techtalk/rear-brake-caliper-contacting-radius-armwatts-link), I am thinking about this upgrade yet again. Presumably the lower profile rear calipers won't have any interference issues. I'm OK with the handbrake delete (I'm in the US and in my state the car will never be inspected again). This setup seems to need a proportioning valve, although my calculations of brake bias don't seem to suggest the bias moves all that far rearward compared to the standard setup.
I'm wondering if anyone has done this upgrade, or driven one of the R300/420R race cars with this setup and can comment on performance. I have never plumbed brake lines, and I would have to get the appropriated line flaring tools etc, but it seems not too difficult to learn. Also I would need to decide on a cockpit-mounted prop valve vs one in the engine bay (much easier to install). Wondering if the easy adjustability is really necessary, as I won't racing in the race.