Update on my detective work on this issue (blink code 12-11 which is "Left and Right WSS reversed on an axle"): After a couple of calls to the Bendix Tech Team, I lucked out and got a nice fellow named Chad and I recognized him from some YouTube videos that Bendix put out several years ago. He spent quite a bit of time going over options of what the issue could be.
1) Some of the early EC-60 control units had some software glitches and were replaced under warranty. (I have 127 occurrences of this fault in 12 years, but not covered)
2) In the tight turns that tend to give the fault, an inside wheel might become "unweighted" and fake out the ATC system which could cause an ABS issue. (least likely)
3) The issue might actually be that left and right sensors are reversed on an axle.
Chad explained that no diagnostic tool (RDU or ACom) is going to give me any more info than the blink code feature has already given me. The best way to know if sensors are reversed is to go underneath and locate the connector from the wheel speed sensor wire where it plugs into the wiring harness somewhere along each axle. Then unplug one at a time and do the blink code test. That fault will say which sensor is open/unplugged. If you unplug the "left" and the fault comes up as "right", I'll know the WSS are actually reversed on that axle.
Next time I'm not parked on gravel, mud or snow, I'll give it a try and keep you posted. Still open to any and all input from the group!