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What sort of problems?
Shimano made stiffer rings to deal with DI2. I've used Praxis for a shitload of miles though and they mostly work fine. I a weird chainsuck incident in one of the TransAms but that was resolved with a punch and I I might've not had a Praxis outer on at that stage but a 46T from some other manufacturer.
The new rings on my new Zayante's are right good. Shift just as quickly if not faster than Shimano rings. Could be perception but they are great on first impression.