Hi @Silver,
Were in the same boat! My trusty i4 hasn't skipped a beat for about 4 years as well, but like you, I want to use the i4 as a backup/travel charger and use the new SC4 as a primary. I've also got two 20/1700 mods and I'd like to actually take advantage of that and use those size...
You're welcome @Hooked... The owner is a fantastic guy and it's nice to see that he is increasing his range of e-liquids. Looking forward to your reviews.