Looks good bbxlr8. If you ever have to raise the mirrors, I think you have enough of that tower that you can add a length of 1" angle iron to the outside of the tower, and clamp it where your clamp is now and once again a couple inches just below that clamp. That will give you height if needed. I was fortunate that my towers had the two large holes at the top of the towers. I said I used washers, but in fact used a couple pieces of cut flat stock with holes drilled the exact size I needed only after concaving two of the larger fender washers. They worked, but I was not happy looking at bent washers so went through the trouble of cutting, grinding, drilling and painting the two square washers I made. It made me happier doing it that way. But then again I can sometimes go too far with some things...LOL
Nice job!