Thanks very much to another thread posted by Gus and Debra Funderburg!. First using a stud finder and drilling from inside out drill bit ONLY! Secondly then using a 4" hole saw from the outside in to complete the vent hole. When you invest in these trailers as we do making the first cut needs to be ONLY after you have measured up to 6 times!
I did run into a pesky piece of metal behind the inside wall, which had to be removed with a dremel tool.
Ford and Lynn (Mojo and Gizmo)
New to full time....loving it MOST of the time.....
2017 3970RD
2015 Chevy 2500 HD