I'm still a noob at this too so take my advice as it is. I've had the odd tunneling issue, usually on cold windy nights but I think it's usually related to smoking too fast vs the wind itself. I try to keep it to a puff sequence a minute, especially when windy because that seems to create a drag on the cigar itself. Smoking in the wind (which there always is here) has caused uneven burns for me but that's about the only issue. If I had the opportunity to set up an inside place to smoke I'd be all over that right away. Nice to sit outside on the nice days but winter's here suck. Just another noobs 2 cents worth.