510 whistle tip to replace the end caps (soft or no) makes the carto hit very smooth and nice. Every time I order cartomizers, I order the whistle tips as well. Very easy to run battery end refills.
You have to cut about 1/8" off the whistle (easy with razor blade device) so it does not crush the filler. This increases the distance from the carto when you draw and smooths out the hit. I use the soft end caps for transporting of the filled carts.
You have to cut about 1/8" off the whistle (easy with razor blade device) so it does not crush the filler. This increases the distance from the carto when you draw and smooths out the hit. I use the soft end caps for transporting of the filled carts.