I was having an issue with my t priv not reading ohm correctly. Seems it was reading wrong ohms on the tfv8. Would start out with proper reading at .16. Then each time i fired it, the ohms would be something different. .3 to .5 then .4 or whatever. It doesnt do this with the tfv12. The tfv8 works fine on my sigelei though. Not sure why any of this is so.