Thank you all for your replies. I forgot to mention that I have only several mini did clones (thats the only rba that I could find here in Mexico)
Vanillagurilla, thanks, that´s what I did at first, but didn´t really like leaving them loose.
blackhelix, thanks, my wicks are working just right, but I have to tilt my device when it´s almost finished, that´s the reason for indexing.
ninfreak, thanks, but that seems I little too much for me or my provari (here in Mexico are twice the price, I paid USD $245.00 for the tube alone).
budynbuick, thanks, you got it right, I asked because it matter to me.
Thompson, thanks a lot, you got me thinking, maybe if I remove all the nuts on the positive center post, then push it a little bit just to enough to protude a little bit from de 510 connector, then thread on my device, align the hole to the button and the tight the first nut of the center post might work. I´ll give it a go and then tell you.
Cheers to all of you.