After consulting and thinking about this new system of triggering the CDI I realize that it will likely be timed from the rising edge of the first sine even if that sine is negative or positive first, still first edge.
The bar length should have no effect on the readings, it is just there to trigger the CDI in another way that has no real relation to the tester.
With those settings everything seems to work, but the delay is shown as about 864 when I am giving no delay. That generates the error in the degree advance that I see.
Thanks, Tom