Tim Wescott fired this volley in
:

The holes need to be spaced 100 mils apart, and the hole in the grommet
couldn't be less than 50 mil, and 1/16 is better. So it'd need to be a
pretty teeny grommet.


You can purchase all variety of gauges of stainless hypodermic tubing
(McMaster-Carr), and spin-rivet it.

LLoyd