I guess a better wording of my question would have been "is OR officially supported?"

I was concerned that OR would work sometimes or be flakey or not supported in future releases.

Also, unless I tried multiple combinations, the subtleties like not needing a 2nd INGROUP in the newer kix would not be known.

I am using 3.61 and will be upgrading to 4.2x this summer.

The missing " was a typo, of course...

Thanks for the replies...