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It would be pretty simple for SRM to drill the spider to take the 4-bolt chainrings if the team wanted them.
Power2max released a powermeter drilled for the Shimano 4 bolt rings, I quite wanted one - however they shelved it after finding that the design impacted accuracy to a non-trivial degree.
Why I have absolutely no idea, and it would appear that it's not troubled either Pioneer or SRM, but interesting to think of why.
It would be pretty simple for SRM to drill the spider to take the 4-bolt chainrings if the team wanted them.