My husband and I both have SMOK mods, luckily they take the same coils. We are currently using SMOK V8 BABY-T6 coils. Are there better but still affordable coils that we can use? I use mine more then my husband does so i get 1 1/2-2 weeks of use, and he gets about 3 weeks out of his. Were also looking to replace our mods altogether because mine randomly leaks, any recommendation on affordable but better mods?