No, it's just the design & metallurgy causes the failure - the modification is a separate issueIs it the extra torque and being drilled in a less meaty part of the crank that causes the failure?
I'm interested, but they are not posting the item, meaning I can't get it. Bit of a mystery why these are not p&p?Been down a rabbit hole, don’t know why as I’m not going to buy them! From the collective wisdom of the interwebs, if it’s drilled in the fluting it’s not factory, if the fluting ends before the bolt for the chainring it is probably like that from the factory. Anyway hope someone after this sort of thing is nearby, that one at the top looks a lot like the one in the photo from @Foreigner which is on eBay for over £400!