I rotated the IP toward the engine which advanced the timing from 22.4 to 24 degrees BTDC. The fuel could not be put in ATDC because then it wouldn't do what it's supposed to do - compress - and the unburnt fuel would get blown out during the exhaust stroke.
I was amazed that rotating it only about 2mm was enough to correct the timing and make a verifiable difference in how it runs. The engine now runs smoother at hot idle, and the engine doesn't shake the car any more with it's in gear and stopped (low idle). Thanks to the both of you who provided tips.
When I get back from the trip I'll let you know how it affected fuel mileage. Right now it runs on 100% biodiesel, but I'll have to run normal diesel on the way, so the mileage will improve anyway, but we'll see how much.
Thanks again,
Adam