chipset

If i have a hana dna 40, could i swap the board for say, a 75c?

I have some extra cash saved up and was thinking about a new mod, Has there been a crazy difference in mods in the last couple years that would be necessary to upgrade? Im open on brands but if im buying something id like it to be cutting edge and new, Or should i stick with my classic 220 and...

I have been vaping for a little more than a year and have been using a Rx200 with the joyetech chip. I'm curious to get opinions on the difference in the vaping experience in terms of better performance relative to ramp up time and cloud production. Concerning the joyetech, Yihi and DNA chips...

I don't know if anyone has had hands-on with the Sigelei 213W, but just in case, I have some questions: 1. How does the chip fare vs the DNA 200 in the TC arena? 2. Is there a button "lock" to prevent accidental up/down button presses? 3. When is the estimated release date/period? I am looking...