You can totally chain vape your heart out! Just squish the bottle gently whilst sucking on it and NOT hitting the button to add more juice as necessary. One of the most common recommendations when you get a Reo is get some juice with lower nic than you usually vape... because you *will* be using it as a pacifier! The mini can't go to 6 volts- just 3.7- but the Grand can do 6. The 3.7 with a LR atty is plenty for me, but YMMV.BTW, can you chain vape with the Reo mini? it looks awesome that you can hook up a bottle of ejuice and not have to fuss much more than pressing the button... I favorite-ed the page for future reference. It's looking better and better to me the more I look at it. So does it end up being 6volts? dunno...
And yeah TV is *awesomely* priced for the quality. Geoff's Blend is really good- it's this slightly fruity, slightly vanilla-y, hint of cinnamon INTENSE flavor. So good! When I purchased from them, I got a bottle of 48 nic and a "doubler" of the same flavor (more like a quadrupler for me, since I use 12mg). And that's incredibly reasonably priced.
So glad you've found the transition relatively easy- that's so amazing to discover, huh?