Many thanks for all the responses.
I dropped by a local RV dealership and checked out a Dometic with wood inserts .. sure enough two screws hold the top trim plate on .. seems so simple. Also the wood seemed really solid to me.
Petunia has calmed down .. so that means I can relax too.
Besides I have bigger things to worry about ... what tonneau cover to get, gauges for the truck, brake controller, etc.
This sure is fun ... but ...
This wait is killing