The ignition module on my 03 sportster xl 1200c is bad and I need some advice about the one I am looking at to replace it with, I have checked out a few different replacements but am leaning towards the Ultima #53-644, I would like to know if any has installed one of these or know something that I should know before buying it. I know it is listed as a single fire model but it also can be set for dual fire which my bike is, any suggestions guy's? Thanks in advance