How to drill holes in thin steel?
To save me going through the trial and error stage (I can only eat so many Altoids), what is the best way to drill a matrix of neat 5mm holes in the lid of an Altoids tin? Centres will be 12.5mm (1/2") so reasonable gap between.
How do you clamp and support the tin without bending it?
What drill speed do you use?
Drill pilot holes?
Drill from the inside or outside?
I have a bench drill and usual workshop stuff available.