I'm looking at getting a "small as possible" device to pocket. I'm thinking 400mah eGo with the smoke mega dual coil LR (1.5 or 1.6 ohm) atty. I see most sites say not to use these attys with smaller than 650mah eGo. I've used them on my Twists (650 and higher) without a problem. Is this unsafe? I still have a bunch of 808d stuff laying around but it's really not enjoyable since I started using VV stuff months ago. Is there some other small alternative I should look into?