It took me about 4 hours to figure how to take apart GL1500 mirrors apart to be able to install Arrows for turn signals on the back side of the glass. Its not as bad as I thought. Here is the picture of them on. Next set I will try something different with turn signals and on the left will be the volt gauge and on the right will be the outside air temp on the inside edges. Any and all feed back is welcome. These are going on Larry's Trike I'm fixing up. By the way total cost is about $10.00 to this job.