You could do that or you could mount one of your choice at grate level or anywhere else on the sides with a proper drill bit. Ultimately you will probably want to use a digital pit probe of some sort.
I don't necessarily agree. I don't like using my wireless thermometers BUT I have had three faulty units. I DO LOVE the thermapen though :thumb:
Now for the used WSM: I would offer lower on the older model WSM since it does NOT have a thermometer, even though they can be wildly off lol. Just consider it a negotiating tactic. Also I paid $220 for my 18.5" WSM shipped so 175 for a smoker that is 3 years old doesn't sound like my kinda steal, I mean deal. :becky:
That being said, the smoker will run great and you will indeed find that you do NOT need an automatic temperature control system. THAT BEING SAID you will find that you want one anyways :becky: The only issue I have with my WSM is when I am doing a turkey because it is slightly difficult to keep the smoker over 300 degrees without doing any mods to allow for more airflow. Maybe I am just brain damaged, which is more than possible :doh:
Another thing to consider: Once you are in love with the WSM you will want a bigger one, which brings up the underlying issue: why buy a WSM when you can build a UDS from the get go? THAT BEING SAAAAAAAID, when I was looking for my first smoker I couldn't find a single drum without the dreaded liner which is why I went the WSM route. Now after building a UDS, and having the experience of using each, I would be completely satisfied with the UDS.
To recap: buy the used unit at a better price and love it :thumb: and/or build a UDS lol