Saw a 1/16 x 6" drill bit at the hardware store last week and thought why not?
Bosch BL2631
I have yet to encounter a cigar rolled too tight to smoke, but at less than $3 on-line in some places, it beats spending $30 on a name brand tool if it works.
Carry in a gutted Bic pen so I don't accidentally stab myself.
Tested it out on some bargain sticks and bored a hole only as deep as the flutes initially, but you can go as deep as needed.
The resulting hole was so tiny I doubted it would have any effect. On the dry draw in 5F temperatures, the increased airflow was noticeable with a laser beam of cool air on my tongue that wasn't there before. The cool sensation did not disappear after lighting and only went away gradually as things heated up.
Overall I'm happy with the results.