I've been a big fan of the lowly Revolution. With the included 3 ohm cartos I initially thought it was a ripoff. With 2 ohm, it was pretty nice, and 10 ml of juice more than lasts me all day. Since I've gotten Darwin(s), it's been relegated mostly to outdoor things, where I may damage or lose Darwin. I mow using a 1952 tractor with a 6-foot finish mower, I would hate to drop it and mow over it.
Those of us that are familiar with the Boge Revolution, you know that second door that comes off, and has that carto storage spot? Dremel it all off up in there, and there could be space for a DNA. Leave the opening hole at the bottom, and it could be just right, to mount the adjustment pot. Stick a little screwdriver up there for adjustment. I find that I tend to find my favorite spot on Darwin with a particular juice/carto, then I often don't change it much. Having the adjustment recessed up in a hole with a door over it would be impossible to accidentally change it, like you can with a dial. Food for thought, anyway.
EDIT: I looked it up, and the Revolution 2.1 version has two 700 batts in parallel for 1400 mah, so it might be a good candidate. Before I got Darwinated, I also liked the Revolution in a vehicle, as I could use it directly from cig lighter, and always arrive with a completely charged device.
There is a protection circuit on this, I tripped it while trying a 1.7 ohm atty (thought I killed it, power off and plug in charger to reset). It probably won't be good to try to draw high current with it, but for middle of the road vaping, might be nice.
