Yes,I figured that.Now it is a matter of deciding each one I want and what I can fit into the old cut-out.(or how much space I have to fit a larger one.)What I have now is a Norcold 774.Norcold conversion/replacement chart said the replacement is a 400N.I haven't seen that many of the model around used/reconditioned.So,I'll just stick to as close as the 400N is for a cut out and then see what I can get for the replacement.
Thanks for getting back to me,
The one thing about a do over is you get to do what you knew in the first place.