I finally got around to installing them.
Here's the original thread.
Side view mirror turn signals
Actually, I made a new set too. The first set didn't look that nice, I free-handed the cut-outs for the LEDs. This time I made a jig so that all of the holes were perfectly round, in a straight line, and the same size.
They work perfect. Didn't change the flash rate of the turn signal. I had a motorcycle that changed flash rates when I installed a new set of turn signals (don't know why). They are bright in the dark, but not too bright. I'll take pics when the sun goes down.