I had to take some time off, and do some more reading and pondering.

I put my original EHA back on the FD and I was able to get 0.3 bar DP and left it at that for now. Whoever wrenched on this engine before me, had the Sensor Plate adjusted so that the FD plunger did not set at the bottom of its travel and the FD was dumping fuel into the crank. So I reset the Sensor Plate so that there is about 3 - 4 mm of travel before the SP makes contact with the Plunger.

I can now "ALMOST" get the engine to catch. I have no idea what, if anything, was done at the throttle position potentiometer. Any ideas as to what to check?

EDIT: Went out and tried to fire the engine off again. Normally I turn the key one, depress the throttle to the floor, release the pedal then crank the engine. This time I pushed the pedal to the floor and cranked. Twice I got about three cylinders to fire then the engine died.

Just to add more fat to the fire.