I don't know if it was mentioned, but at full/flank speed, the shafts spin the correct direction in reference to the pitch of the props, however, at lower speed settings, they reverse. So at 1/3, they're spinning like if you were in 1/3 reverse, not forward. So I don't think reverseing the props X or Z or XZ would really help, as it seems to be a core coding issue. You'd have to be able to determine the rotation at all telegraph settings.
My .02
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