I tried the sample and my 510 got stuck in 10 mins cuz it did not say in the manual anywhere that it was reverse threaded. Also it was made of the softest copper ever and stripped where the screwdriver met the copper. The new one is supposed to have new 510 contact made of plated brass to be stronger, along with new copper battery contacts, and a new battery divider in the batt compartment, and stronger magnets. I have a v2 black one coming tomorrow but from the sample i used it is one hell of a box mod. 4.0 volts is much differant than 4 volts on my xxix, brass manhattan, and oros clone, it actually hits alot harder. I tested volt drop on the sample at 7.5 volts at .3 ohms there was .05 volt drop...that is just nuts. I wonder if the new one with the plated brass contact will have any more volt drop. The battery life is just rediculous, with 2 sony vtc5's i can vape for 2 days on a nuatilus. I cant imagine using 2 panny 3400 mah, thats 6800mah lol. All in all this is the best box mod I have tried to date even tho you have to build subohm to get the full 100 watts. 60 watts or so at 1.4 ohms is ok with me, although it seems they could have done a little better in that respect. It may have to do with the sx330 v3 chip which is probly running at near max at 100 watts. Time will tell if this chip can handle the power and not go up in smoke after a 2months of use like my chana dna30 did from cloupor. I will update you all to see if the new plated brass 510 contributes to more voltage drop that the redic low .05 on the sample.
On a differant note i got my BIG DRIPPER today and I love it! Although there is no way it is 5ml capicity like it states lol. I got 4 glass dropper full of eliquid in it. It vapes so nicely with dual 26 guage gplat micros in it at .27 ohms and the tank doesnt seem to get real warm like I was worried about. This is my first build on it tho and this may not be the case when i get my 100 watt as I will be pushing more heat thru it. I got the fastech 14 and some change version and it is great. Air holes line up and all, the only thing that worries me is that it didnt come with spare grub screws which we all know are easily lost or stripped where they meet the allen key. Anjy questions for me just let me know. Laters.