PGA limits total volume of grooves allowed per square inch of a golf club

Groves? I think that should be "grooves"; I thought this was about limitations in the amount of trees on a golf course, which seemed cool. :)

I was a bit surprised about the unit though, "volume per square inch" is weird.

I take it that you can buy extremely grooved illegal iron clubs with super-bitey faces.

That video was more extreme than 42 libraries of congress.

hackers fixing sports with numerical analysis. I love it.

fine tuning game design is a fascinating subject. Sirlin's long articles on the subject are great. http://www.sirlin.net/articles/super-balance-articles-ii-tur...

Isn't this off topic?