Why does Pogle goes into TRIM and set the telecine to varispeed
when performing?
This is because both the telecine and the vtr have out points. See varispeed editing.
Why is the Spirit edit runup changing by a large amount?
It will be inconsistent with 50mm film cores. Use 75mm cores.
Why does an edit fail with the message TK early
or TK late?
The telecine is probably early or late relative to the edit IN point.
Check telecine configuration.