My McMaster Carr bobbins holding the rectifier on finally self destructed toward the end of last season. So, I went to the local Harley Davidson store and talked with the guy at the parts counter for a bit. We found HD part number 90524-04 rubber bobbins that are for a seat mount that he thought may hold up better that what I was using.
The rubber area is smaller than the stock bobbins, so these would only be practical for the rectifier application, but the parts counter guy said they they would be stiffer and less prone to jiggling themselves in twain. They now have a few hundred miles on them and they seem to be holding up alright. I will report back with any failures.
