That's pretty much it in a nutshell. If the aero parts had been used only by Petrucci (to counter the rear tyre overheating as a result of his burly stature), then nothing would have been said – it was a modification widely accepted by the other manufacturers. It was only when they appeared on the GP19s of Dovizioso and Miller for the race that the s*** hit the fan. The Court of Appeal must decide whether the bolt-on is a tyre cooler, for which use it was approved, or an aerodynamic device, in which case it “isn’t permitted in the guidelines” (note that last word). Or perhaps they'll decide that it’s a bit of both... Considering the rules as they stand don't ban the use of the aero parts in question, I'd be surprised if the results are overturned. Ducati themselves have been pretty bullish since the protest was deferred, with an alleged counter-attack coming in the form of a protest against Honda regarding their fairing-mounted aero – the "X-Wings" as some have dubbed them. According to Dall’Igna in an interview with a local newspaper, the thin profile of the wings mean they're likely to be flexible under aerodynamic load, something the rules deem illegal.