390s and the matching rears are first, 400s are an easy and quick 2nd.
We don't have pricing yet, but they are certainly a substantial and premium rotor.
The goal is to be ~1/2 of a set of cf rotors, but 2/3rds might become a reality?
Another hint is that the raw material, depending on supply chain status, is $110-150/kg. More than once over the last year or two, as things were crazy, we were forced to pause as material pricing either inflated beyond reason or was just plain unavailable.
This pricing is one of our main struggles and focuses, if we can get our preferred suppliers to play ball, we can really bring our pricing back down. They don't seem to care that we are using orders of magnitude more material than most manufacturers. (Most manufacturers are either using grams and making hundreds, or kgs and making a couple of units - we are making thousands at ~20kgs per set)