Originally Posted by Scottrik

I've found that my bench grinder does a pretty good job. From there it depends on what sort of triangle you find runs fastest for you. While many find an equilateral triange to be the fastest on a more open track some have decided that an Isosceles triangle offers better on-power steering on tighter layouts. I've been experimenting with a scalene triangle set-up that seems promising.

And remember...right triangles are just plain wrong. The grip like a bunch of pissed-off road monkeys...for about 2 minutes.