Complex or simple
I am not sure from your post what you need, but I fried by engine harness, and was delighted to find I could buy a replacement all made up. (See link below.) I replaced the engine harness, but not the harness from the plug to the plug by the control panel. It was pretty easy just to take off the old one and connect the new on in the same way. I know that there are ways nto upgrade at the same time, but they were a little above my neophyte skills, and it works great!I also have a 3 blade with the 5411, and I appreciate the extra bite in the bumpy waters of Nantucket Sound. Since I don't race much, the drag does not concern me overly.Good luck.RogerC27 #5012 & MabelCape Cod