DIY Tire Shaving?

[Jonathan Roberts <jorober5@vt.edu>]

Due to lack of funds and (sometimes) limited availability of shaved tires,
I was curious if anyone had a good technique for "do it yourself tire
shaving"?  

Specifically, I would like to shave Kumho's, and I know approximately what
4/32nd's looks like, so the depth itself isn't an issue, just the shaving
part.

I have more time than money so $40 to shave them might be worth a bit of time!

Thanks in advance,

Jonathan Roberts
'91 MR2, C-stock