The OP stated in two of the three posts he has made that he has a MB shop he uses. Now he is telling us what to do?
Mouser is explaining something which does not exist, he has posted only a few times before about the same number he has made in this thread.
BLCR is saying his key works fine so there is no reason to fix it, either it has been done before or he has this fault to rear it’s ugly head in the future.
I think we have a spill over from Face Book.
I do not bother to answer questions very often these days, it’s all been done before.
I pointed out the weaknesses of the smaller SC pulleys, they were ignored. Not long after they started to grenade and still people purchased them. These were mainly made to make a fast buck and when they had to be replaced the makers started to quit making them. Even the OEM pulley will fail as the springs get weakened by use, but that will be long after the quick buck ones have all failed.