Neither the CRB nor the STAC (nor I) has made a proclamation that "no" consideration will be made until data on a full-tilt build is presented to them.

However, there's absolutely zero point in making chances until someone builds one*.

We can always go back to "US market engines only" if it'll make people feel better...that way there's no ambiguity.

GA

* If you truly believe that 2mm of TIR will make that much of a difference, enough so that you'll not even consider building it, then IMO it's not going to be a competitive package anyway...