You are welcome. However, wait for more replies. I thnk I know what you're asking. Wait for some other guys who might have a different take on what you mean.

I have no idea what your builder means when talking about support only on the upper third. Can't picture that.

Calling Dr. David R....Calling Dr, David R

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The only reason some people get lost in thought is because it's unfamiliar territory.
- Paul Fix