Caldera and CO

In his exhaustive series of stove tests for CO, Roger said that the Caldera Cone needed a lot more venting, both top and bottom. I also read that Will and Roger were actively working with Caldera on improving things.

What came of that? Did the windscreen and/or stove get materially improved? If so, as of when? What should I look for to tell whether my Caldera is the improved model?

Thanks for any info,
Bob