The new FlightFender v2 changed the layout of the base and no longer fits in the FlightFins cutouts on the TFL footpads. FlightFins sells their official adapter here:

https://shop.flightfins.com/collections/xr/products/kush-pad-adapter-for-xr-flightfender-refresh

But if you wanna save a few bucks (or FF's adapter is unavailable), print these instead.