i just recieved my 801 today and have been using it for several hours and i have noticed several things about it compared to the 510. first i get much more vapor production with the 510 using the exact same juice. why? second the 801 after a few pulls gets a burnt tast. im sure the atty is getting dry but the damn carts hold so much more liquid than the 510. i can fill my 510 and it takes quiet a while before i have to top off but the 801 i have to drop 1-2 drops on the atty evry once in a while. is there a reason why the 801 is getting the burnt taste so soon with such a bigger cart? i have even put the PTB in the 801. please help if you can. i was thinking the 801 was going to be much better than the 510 but as of right now its not.