You might want to consider something like this, try to keep side hole patterns the same and use CNC to do face holes as CNC is easy to adapt to different hole patterns. In the end it really doesn't matter where the holes are as long as you have the right program loaded.
Yes, this is what I am thinking at this time.

It a one man operation on the drilling.

Thanks for the sugestion on the dry lube I will definitely use it.

Just for my interest, if you all would sugest a machine for simply drilling holes in the top of my enclosures which one would it be?

Thanks,

Randy