[Fudd]

DareBee,
No, I do not. I have not worked with 17-4 PH. Have you worked with it alot? I was told to look toward Guhring drills and the factory quoted me 40 sfm .002-.003" IPR. I will be drilling through .5" plate. What drills do you recommend? I was going to use a parabolic drill. What about pecking and do I need to spot 1st?

Thanks for the help,

Scott