Choosing to pay more for 105 over Ultegra (4iiii PM)

There was never any issue with the non-drive-side cranks as far as I’m aware, so go ahead risk free.

Are you buying new or used? They do good deals to install a 4iiii PM onto your own crank in the UK - sending in one with a failed 4iiiii PM on it may get you a further discount if you tell them what’s happened.

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