Recently picked up a Cartel Limited Edition Brass and Overdose Copper clone mechanical mods and had inconsistent firing button and heating issues with both. Sometimes they would work perfect and other times they would not fire.
I checked all the usual suspects, cleaned everything, tried different atty's, swapped out springs and nothing would get rid of the inconsistencies.
After a few days I found the culprit. Two of the 8 18650 batteries I had were slightly dented in the bottom! The bottom contact would only hit one side not making a solid connection causing inconsistent firing and heating. Took these two batteries out of circulation and problem solved! (probably dented them overtightening them in a mod at one point).
So if your having issues with firing or button heating check that battery bottom!
I checked all the usual suspects, cleaned everything, tried different atty's, swapped out springs and nothing would get rid of the inconsistencies.
After a few days I found the culprit. Two of the 8 18650 batteries I had were slightly dented in the bottom! The bottom contact would only hit one side not making a solid connection causing inconsistent firing and heating. Took these two batteries out of circulation and problem solved! (probably dented them overtightening them in a mod at one point).
So if your having issues with firing or button heating check that battery bottom!