Ordered my bar/round stock to get rid of the Felt DA splined stem silliness. Got the Aeria Ultimate stem on sale for $100. It's heavy but it super aero.
I'm going to make two base mounts for the Bayonet fork/stem mounting area. One that's easier to fit in a UCI box, and one that won't be. If I get the mount out front of the head tube, the reach coord will likely exceed the single exception distance. If I mount it a touch higher on top, it won't.
I may mount it there anyway as I think the stack will be too low down and out front anyway. I'd have to run all my stack risers at that point.