Hi all... I've been a vaper for 100 days today!!! Congrats to me, analog free too! Here's my question: I use a Prodigy, which I love. But I am looking to get a spare and have been looking at the "chucks". I like the idea of options like customizing and the choice to vape at 6 or 3.7 volts with the same PV. What I'm wondering is: After vaping at 6 volts for all this time, what will it be like going back to 3.7? Anyone try it? I know I can use my CR123's with the Chuck and still get the same voltage, but I would like to try it with a 18650 (3.7v). I mean, I'll probably buy it but should I invest in the 18650 batteries or would that be a waste? Need advice here!!!