In , mike
spake thusly:

the final formula which worked for my needs. Just in case it can
help anyone else.

Glad my input could be of help.

Btw, are you perhaps superseding your prior articles when you
follow up? Your prior articles keep disappearing from this thread
for me on my server. I was going to follow up to your response of
a couple of hours ago, and now that I came back to do so, this is
here (which quotes that earlier article), but the earlier article
is not. If you are superseding, or canceling, I kind of wish you
wouldn't, as having the earlier articles in the thread around for a
bit can be useful.

"mike" wrote:

Dallman, Jim.

Thank you so much for your help with this. Using Jim's theory
i got it working, but now using Dallman's formula I should be
able to get it even more automated.

Dallman Ross