Since nobody replied, I bought the one v3 case and the THRML active cooler, but you cannot use the active cooler with any of the v3 cases. Would have been nice to know that. The case has two metal pieces that come down and make contact with the pi CPU and the other cluster of chips that need cooling. As such, you can’t install the active cooler with this case. Still not bad to have in case I decide to use a different case/run it naked.