Well here is my first attempt at a mod. It was originally a 6 volt 2 10440 battery mod that I toned down to a single battery for a simple 3.7V mod. Unfortunately the epoxy set with the 501 connector a bit crooked but still worked nicely. I also got a bit carried away with sealing it off from e-liquids with Silicone but with the extra cushion the 10440 is a nice snug fit. Vapes very well. 
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