The first thing you want to try is cleaning your positive contact apply some noalox or deoxit to the positive contact . No need to take the mod apart until you have at least tried cleaning the contact
ok ill give that a try. probably just a really small amount right? I bet there are some videos on that. Ill give it a look when i have some time tonight.
all the people that talk about spinning the battery and that fixing that is what your issue is. You have oxidation on your firing pin and or battery. As Rob said first thing first clean the fire pin and the battery top. Don't sand either one. Just an eraser alcohol and noalox is all you need.