Anyone know Holley Commander 950's? programming?

Del,

You did good to stop before going crazy. The system lacks necessary sensing means to work correctly without constant fiddling.

Even the Bosch D-Jetronic introduced in 1969 had manifold pressure sensing via a LVDT (linear variable differential transformer), charge air temperature, bi-metalic idle control valve, and direct acceleration enrichment via special multi-contact TPS switch. They ran quite well, but were very engine specific.

The Commander with MAP and other sensors is a huge step ahead.
Your idea of using the 4B-TB for the 950, is well worth the cost of your system.

Send me a PM if you want me to send an ICV. Another common way is to use ignition timing to control idle speed. It depends, if the 950 has the ability in firmware.