It would be a gross mistake to try it yourself. The holes need to be
100% accurate. If even one is slightly out it will stress the studs,
possibly leading to breakage. If all are out (which is a 99.999%
probability) the wheel will be off-center and will cause vibration.
And the wheel will be ruined.

I had a set of 18" wheels machined. It cost me $50NZ... around $35US.
Why mess around?
--
Andrew Grebneff
Dunedin
New Zealand
Fossil preparator
<andrew.grebneff@stonebow.otago.ac.nz>
Seashell, Macintosh, VW/Toyota van nut

HUMANITY: THE ULTIMATE VON NEUMANN MACHINE

DEMOCRACY: RULE BY THE LOWEST COMMON DENOMINATOR