Firing Pin Modification?

[seabee73]

I inherited a 1918 Erfurt from my dad a few weeks ago, and it seems that all I've been doing is asking questions on this board,but I do want to keep it intact enough to pass down to my sons. Dad (83) still likes to shoot it occasionally, so I'm in the process of replacing critical #'d parts w/ reproductions and reserving the originals.
The new extractor required a little filing and a Dremel tool, but it's good now. I botched a repro ejector with too much metal removal (but learned a good lesson), replaced the Nazi stamped grips w/Sarco's, and the numbered firing pin with a solid one. I have a repro side plate that needs some judicious work with my new needle file set, but I'm taking it slowly, and one part at a time for now.
I understand that the fluted firing pin original on my luger was designed to divert gases from cutting into the breechblock assembly. I'm considering grinding similar grooves on this solid firing pin to protect the breechblock in the event of a pierced / leaking primer, using the original fluted pin as my model.
Any thoughts guys?
Also, any good sources for these Mec-Gar Luger magazines? That brand runs great in my GI 1911s!
Thanks for all your previous feedback!
Karl