Having gone thru this, not quite as extensively as Miles, there are only two brake systems for the S30: stock, and AZC. Anything else and you are kinda wasting your time. Take the time you waste on Toyota swaps and go mow yards. By the fall, you will have the money for the AZC kit and you can install it over the winter. And you will thank me. I didn't believe it either, but Im a believer now.