Hi Dale and all you great folks,
Here is an update:
I had the "Bride" make up a cast iron skillet just full of bacon grease (I am only kidding) and corn bread mix and took it out to the motor home-- Were at home now-- and I pre-heated the microwave to 350 degrees. I use an oven therometer but I have to set the convection oven temp to 410 degrees to get 350 degrees. She cooks it normally for 20 minutes in the oven in the home place. At 10 minutes I started peeking through the window and it was done at the 12 minute point! Wow. I felt like the guy on the PBS kitchen cooking show-- where they experiment with all types of cooking deals.
In short, it works super. Thanks for all your inputs. We leave home Monday for Gulfport, MS and she will get to use the convection oven on this 2 month trip. And Lou, of "Mama Lou's" restaurant fame in Robertsdale, AL (just south of I-10), Cindy is bringing the "cracklin's" for your bread
Thanks again for all your great inputs
Oh, I called GE about the temperature settings differences and they said their tolerance is +/- 40 degrees-- I said mine is more than that and they basically said get a new unit, there is no way to adjust it