After reading what happened, It sounds like you were going into a blind corner too fast. I think riding the Connie is like riding a bull when you get in trouble. It's heavy and when brakes get locked up, you don't have much of a chance of staying on. I have read that when you lock up brakes, you need to lay it down. This might have helped, but I think that is near impossible to do, unless you do it all the time. I know I can't lay it down on purpose. As far as ABS goes, I wonder if ABS gives you a sense of more confidence to go faster.
Here are two things I learned
1. It doesn't matter how long you been riding, you still can get caught off guard.
2. Slow your speed into turns you cannot see ahead of. Don't assume a blind corner is okay.
Pat, what ever the case, I appreciate you taking the time to share this with us. (I am not criticizing you, I certainly don't think I am a better rider than you and this can't happen to me. I'm just trying to learn from it, so I can avoid this terrible experience) The best part is that you are okay.