I have a nzonic v3 clone w a floating firing pin. i originally bought button top batteries but think that they are causing a few of my issues. I cant screw down my protank all the way and have threads exposed on the connector. it functions properlly. So I just bought some aw imr flat tops. Will the extra bit of room in the mod allow the firing pin to sit lower and allow me to get the 510 connector all the way on? I have two ibtanked carto tanks coming soon also because the protank 3 is garbage.