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Yep - the kick will work (you'll need to scrape whatever finish the unit has off where the kick's grounds need to connect). A grand will fit a 18490/500 with the kick installed.
That said, you can dial the vape up and down by building different coils for it. Old school, I know, but quite easy with a good atty like the RM2. I set a grand up with a kick when I first started out and quickly moved away from it when I got the build variables worked out to my liking. Never even contemplated using the kick ever since.
I started with a kicked grand also.
I'm going out on a limb here but I have to say it...
regulated vaping is highly over-rated.
I believe I'm qualified to say that as an owner/user of two provaris the year before I purchased my first reo grand. I was all hung up on the idea of voltage dropping off as I vape, etc. I wanted to try a bottom feeder but that bugaboo was driving me nuts. The reo vv looked too tall ( at least in pics), the grand looked awesomely compact. So I bought a grand and ran it kicked with a 18490. That lasted about two weeks because I realized I could get just a good a vape and much longer battery life just wrapping a 1ohm coil and running the 18650 aw.
Since Rob came out with the upgraded contacts, along with higher mah batteries like the sony vtc5 or the Samsung 25r, things have gotten even better. I wrap the 1 ohm coil and begin vaping at 4v (.18vd) or 16 watts pulling 4 amps. That's already out of provari territory which has a 3.5 amp and 15 watt limit. Usually when I change the batt the next morning, after working all night for 12 hrs,
it's still reading 3.8-3.9ish. That's after 15hrs of vaping and just changing batts out once a day before work. So right before battery change, I'm still vaping at almost 14 watts and pulling 3.72amps (still above provari specs).
And the greatest part of all, it's a wonderful, flavorful, densely saturated, moist vape.
I recently picked up one of the new IPV2 box mods with the sx330 chip. It's a pretty nice mod, a bit taller than a reo grand and the darn thing will go up to 50 watts. But it's a major fail in my eyes, cause it doesn't bottom feed. I stuck a kayfun nano on it and it vapes ok but in no way does it hold a candle to a grand with a cyclone or rm2. Btw, I feel sorry for all these blokes building on these finicky kayfuns when they could just throw a short wick in a rm2 and be done. It was a mere 2 days before my grand was right back in my fist.
yeah, yeah... the grass is always greener, I know.
Anyway, all this babbling is just the long way of me saying, I think you'd be quite satisfied with a grand if you throw a bottom-fed rba on it and build to your own taste.
cheers