After reading a couple of posts I think that my meat is being steamed more than smoked. While I can def. taste the smoky flavor I do not get a smoke ring and I do not see much in the way of smoke coming from the vent on the rear of my smoker. The vent that is on the smoker is very small, maybe the circumference of a standard #2 pencil. Would it be wise of me to make the vent bigger? If so, how big? My smoker is insulated so what should I use to fill the gap that drilling a new hole would leave?