Thanks for the advice, but given that the door, assembly and house were built in 1978, I don't think I can follow up with the original installers.
Funny thing about this house, we moved in here just over 5 years ago and I have been spending time and money, bringing it up to date with regard to appliances, A/C, well you name it!
The folks we bought the house from were Actuaries, which means they would calculate the return on investment on everything, before they spent a dime! We knew what we were getting into when we bought the place, but man o man, were they ever cheap!
HH