I think an in-line meter would be more accurate though as I've noted before the voltage changes from firings. I will fire it once and get X, fire it again and get X+.3 and then fire it again and get X-.3 (just arbitrary numbers) so the contact of the switch with the post may be effecting things. If anyone else has the tools and the time do me the favor and report back if its something to do with my spring delete mod or if it has to do with the switch's contact itself.