I've got a mill, and I've purchased a DRO. I've got no problem with fabricating the components that will hold the DRO to the mill, but I'm kind of unusure of the best way to drill and tap the actual cast iron base of the mill in order to attach my fixtures to hold the DRO.
Do you just use a hand drill and work very slowly and carefully?
Any tips you can give me on how to accomplish this well?
Thanks,