http://forum.cookshack.com/eve...3105064/m/6422990417Read that thread to get a better understanding of your settings. I have it bookmarked and refer to it all the time!
For me 10/20 is about what I run for Low and Slow like a 225 smoke.
I use a 15/70 when I go up to 300.
15/100 for 375.
Play around. You will get the idea.