Smoker Chimney height

[bbqbrisket]

I have a Pecos. I have extened the chimney. It's not exactly the perfect height. Would it be better to be 6 inches too high or 6 inches too low?

 

[chopsaw]

This is my opinion from an in general stack length point of view .
Too long allows the smoke to cool in the stack and possibly condensate and drip back into the chamber .

I used to run mine hot , then feel the stack and find the place where it was cool enough to touch . drop an inch and cut it off .
Not scientific and maybe wrong , but it worked for me .