Battery wise- Yeah, I like a steady voltage myself and tried the VVego from MV when they came out because I thought it would hold at 4.2- it doesn't and it fell apart.
I use a PT most of the day now and it gives me great hits because it keeps it charged well. Not 4.2 tho.
Are you using a thicker juice? Or are your holes real small on the Boges you've tried? Because I popped on a small tank from MomnPops' w/ a Boge in it and been getting a perfect hit with it for the last five weeks w/ 70/30 in it.
It has those big saddle-valve holes in it, and I'm surprised that it's very dry on top all the time- so you're right that they're tight-wove.
I'm opposite you on the cartos tho, I ordered the bigger tank along with my little one, and it had a 1.7 in it and kept giving me dry hits constantly, so I ended up making a Boge fit in the bigger tank. I think I'll try another 1.7 because I'd like a warmer hit and the DC's were a fail for me.
This combo, along w/ flavorless/ low flavor juice is turning into a huge win for me. 5 weeks and this Boge is hitting like I just unwrapped it! I might just sell all the wrapped Boges' because at this point I can through away the tank with the Boge and still come out ahead.
Good luck with your tank adventures!! Hey, have you tried the ghetto tank yet where you just bang the carto through a small juice bottle? The guy that started it had a collection of them on all his mods- seemed to work great.