So I just purchased my WSM 18.5" and I'm now looking for a computer to help control my long smokes. I have seen many different options from the BBQ Guru to PitMaster IQ120.. The Auber seems to be priced really reasonably and should be sufficient for long smokes. I was wondering what fan CFM I should get, the stock option is 6.5CFM.. I would like to do chicken, pork and beef.