Slightly OT: tips for fabricating with plexiglass?

[Tony Duell]

>    One thing you can do is pilot-drill it with a much smaller drill, and 
> then run the big drill half-way through, flipping the work over and then 
> drilling from the other side so the holes meet in the middle. This takes 
> some accuracy, and a 'jig' on a drill-press, so that the holes line up. As 

You can also dril from one side until the point of the drill _just_ 
appears on the other side, then flip the workpiece over and drill from 
that side. I've drilled brittle plastics using a hand drill by doing that.

-tony