I have been owning the Igo-L for about a week, and as is known, the airflow on this item is tight. It has been advised to drill the hole out, but I have read different sizes.
So, what is the optimum airhole size?
Also, is there a special type of drill bit that is needed?
So, what is the optimum airhole size?
Also, is there a special type of drill bit that is needed?