So I'm loving my tfv8 rebuildable deck. I love the process of installing cpils and wicking it to perfection. Still surprised how wicking can affect flavor so much. Any way my question is when do I swap out for new coils. I just have some pre built claptons in there right now. Can't see a reason to chang them , but I wonder is there a marked change in performance or some other dead giveaway I should keep a look put for as to let me know it's time to change to a fresh set of coils?. I'm sure it would be obvious but just wondering of your more experienced users with rebuilding what says it's time to change. ?