First I want to thank you for your service!!
Welcome, from southern Ohio, to the best forum on the internet if you are looking to learn how to BBQ/smoke/brine/cure/inject. Well you get the picture if you can do it to to something you put on a plate to eat then someone here has probably done it. Use the search bar at the top of the page and you will be led to the answer to most every question you can think of. If you don't find the answer there then just post it and someone will chime in with their opinion on the subject.
Here is a link to the Masterbuilt owners group:
Lots of good people there with lots of knowledge.
I have a Gen. 1 MES 40 and the best thing I ever did was get an AMNPS for my smoke. Never liked the whole chip loader wood chip mechanism on that smoker.
Always remember the only dumb question is the one you don’t ask!!