Thank you all for your answers and input. I've only had one real draw issue, out of about 70-80 smokes in the past few months, a CAO Cameroon that was really loose. I'd have to go back and check my notes but I think it was a box press. No tight draws at all.
Burn is my usual problem. I'm fighting outdoor RH in the single digits, with heat in the one-teens/one-twenties, wind, and questionable humi RHs since I'm using everything from 20-30 ct desk tops to Fuente humi-packs to zip locks. (I'll be home with my end table size humi in 7 weeks, don't have access to anything other than styrofoam coolers and can't see spending over $100 on hygrometers just for a few weeks use)
So overall, I attribute 1/2 environment and 1/2 me and was just wondering if there were any keys to look for that could really add construction issues to the lot.
Thanks again for the info guys!