Many thanks to DrEntropy for the good advice on the enrichment adjustment on the HIF44. While it did take considerably more turns than anticipated, the "in" (clockwise) adjustment does, indeed, result in a richer mixture. The B is running very well and I am still making fine tuning decisions almost daily. Very pleased with the operation and response of the HIF44, and I'm glad that I decided to give it a chance.
If anyone knows of an SU (or other) publication/manual containing (more) complete details of the HIF44, I will greatly appreciate the name of the pub(!). I'm sure that I should learn more about the setup and tuning as soon as possible.
Thanks again for your help DrEntropy :O).