Originally Posted by
himespau
Huh, I like that idea. Never occurred to me that was even possible. I suppose, even if I removed a couple mm, it wouldn't affect structural integrity or ability to shift much.
Hold a Sharpie against the crank arm and swing an arc on the blade at the depth you need.. Grind to the line, blend and polish both ends. 2 or 3 mm over the short length you need won’t affect structure much. The one I did shifted well.