. . . yep, installing the front and rear LED turn indicators, one side only, I get turn signals on that side and 4-way flashers switching to the other side. Same with the LED flasher.
So, I installed only the rear (only) LED indicators and get proper turn signals! That's how I'm going to roll, for now, while I try to sort the regulator and charging circuit.
I'll obtain the correct dash indicator LED and put that on my list of "more things to do."
Thanks, Kiwi_Roy! I would have been so frustrated and ticked off if this were an unexpected outcome! Once again, you guys totally rock!
(PS- This new LED flasher is quite large. I have a modified location and modified seat pan, but it may not fit in just any V11.)