Here is my wish list
1. Adjustable center pin of some type is a must! I would love to see a spring loaded one so you just screw on and be happy.
2. Better airflow on the 510 connector, it just doesn't keep up these days of higher wattage. Better yet airflow control that allows flush mounting on toppers that gets air from the 510, clicky like on the Nautilus
tank.
3. Three models, a 22mm flat-top (20\1 threaded), 23mm flat-top (GG threaded), and a beveled top like the one now as an option. The third model is a new slim line 18.5/19mm for Protanks/Aspire
tanks. This model wouldn't need all the power of the full sized models, 5V/3amps/15watts. This will make everyone happy, as they can still use the toppers they use now and get that hybrid look too. Only do the hybrid connections if it can be done with out adding to the length of it, that would be counter productive if it just made them longer.
4. More power is always better, but not at the cost of efficiency.
5. VW would be nice but I wouldn't mind if it didn't have it, and again not at the cost of efficiency.
6. More efficient, better battery life is key for me and as far as I know of no other VV/VW mod can touch you on that and the less batteries I have to carry the better. I will say I haven't used DNA20 yet so I can't compare.
7. Size matters!!! Shorter is better no matter what she says
8. Change in the menu system, 3 clicks gets into the menu, 5 clicks power on\off with no menu like an ego. Quick and easy with no waiting on the menu system. Maybe a quarter twist design on the battery cap that disengages the battery instead. Really I just want an easier, quicker way to turn it on and off.
9. Price! keep it as close to the same price point as possible.
10. Nicer screen, but it must be readable in bright sunlight and not so small you can't read it at a quick glance, I don't want to kill myself driving trying to change the voltage/wattage.
11. Upgradable of older devices are welcome but if it keeps you from bringing us the best and a great price then start from a new design.
12. Put a big picture of China on it with a red circle and line through it and see if China clones that, lol.