These FAQs pertain to the ST-6:
I have an old ST-6, can I upgrade it to an ST-6B?
I'm having trouble with Track and Accumulate with the CCDOPS for Windows.
My ST-6 is frosting. What can I do?
What is the current ROM for the ST-6?
What is the difference between the ST-6, ST-6A and ST-6B?
Why can't I establish a link to my ST-6?