Does anyone know why mother honda put the big ding on the drive shaft side on the swing arm? Starting to try to get my DUCKs in a row, before I start the full 3 wheel conversion! I am getting to old to hold that puppy up, probably only have about 20% of strength of what I had 15 years ago, anyway I was just curious about it, I want to cut it out so my shaft will go thru without without any problems!! Thanks Charlie in NC