In the wake of Ducati's controversial 'tyre cooler' winglet - or 'swinglet', as it's become affectionately known - being given the thumbs-up by MotoGP technical director Danny Aldridge, the floodgates have cracked open ever-so-slightly. Other manufacturers are creeping in with their own swingarm appendages.
And as Aldridge has been reassured, the important thing to note is that they're definitely not there to create downforce - not at all. There might be an inadvertent by-product of a few Newtons of downforce here and there, but they're actually there to cool tyres, or improve the stiffness of the swingarm. Apparently.
Honda got its own design homologated during the Argentinian Grand Prix weekend before it made its first on-track appearance in the United States, while Yamaha and Aprilia brought winglets last weekend's Spanish GP - where Suzuki also tried its own design in the post-race test. KTM also tried one out in practice at the US GP, which means that all manufacturer operations have at least dabbled with this year's most contentious piece of kit.