"K Ludger" wrote:

I'd like to drill the holes in one go (ie not pilot then change & drill) any
recommendations as to the best approach or tool that I should use?

Well, looks like you need to use a hole saw. Wonder if they make them with brazed in
carbide teeth?

I'd drill for a green lee punch and punch. I'd also beg borrow or steal a hydraulic
model or have an air ratchet to drive a non-hydraulic punch.



Wes