Good day. I would like to put my 2c in as well. Firstly i use a mech everyday ( VGOD pro mech 2) with a vtc5a with a 0.14 build on it. I know that is exceeding the CDR. But i have come to learn my cells, what they can and can't handle. I always check the wraps and the positive side of my cells if the 510 didn't dent it in. The heat of the cells is the other thing i check when exceeding the CDR. Just adding that i don't chain vape my mechs. I also understand that i will probably have to replace them each year rather then every 2 + years because of the way i use them.. I have a general rule of thumb to replace cells after a year... Even if they are still fine... i do NOT encourage this by me posting this...even if i use a mech within the cells CDR i still check the heat though... But i have found that my sweet spot is 0.12. Above is one post made by Mooch. Thank you.