Been doing a lot of reading and thinking and decided to make a smoker shelf/workbench. I spent hours on the forums and learned that a 3" pipe will fit right into the vent. You can still use the vent open/close.
Here is the whole shelf unit
The height of the smoker is perfect.
I started with a 3" adjustable elbow coming out of the smoker vent then into a straight 14" 3" pipe. Made my measurements off of that inserting 2 more pipes and 3 more adjustable elbows.
Taped all the seams with aluminum tape.I found it easier to tape it all together then put it in place.
Connected 2 elbows through the wall of shed then into a straight 24" pipe with vent cap.
Noticed in most of the vent posts on here that people say to keep the vent above roof for better draw on the smoker and they were right. Out of the weather and couldnt be happier! Total cost was about the price of just the stand masterbuilt sells. Gave the smoker a test run and didnt have 1 leak but the smoke was pouring out the pipe vent. Time for a beer!