Three of Formula 1's biggest teams have introduced a range of tweaks over the previous two grand prix weekends.
Between them McLaren, Ferrari and Mercedes have adapted, refined or changed a number of aerodynamic elements on their respective challengers.
Craig Scarborough's videos delve into the detail, explained by Stuart Codling.
The perfect Formula 1 car from 2016 Mercedes swept all before it again in 2016, but it was not the perfect car - take some bits from rival teams and you'd have quite the potent racer... F1
F1's new development war has already begun The last grand prix weekend before the winter offered teams a great opportunity to get a headstart on work for 2017 F1
F1 teams still pushing with an eye on 2017 The F1 development race hasn't slowed down as much as expected in the final races of the current rules cycle, with teams still pushing to maximise running before the winter break and Mexico-specific solutions on show this weekend too F1
A glimpse at McLaren's 2017 work at Austin? McLaren struggled at Suzuka, but on Friday at Austin it introduced developments to its MP4-31 that could well have next season in mind F1
The small change that will be F1 2021's big talking point As focus sharpens for Formula 1 teams on the new, yet familiar, 2021 cars there is a growing understanding that this year one minor rule tweak will actually create a major challenge F1
Why Renault's survivor wasn't part of Alpine's plans Even the most skilled and ambitious political operators can come a cropper when organisations change. STUART CODLING reflects on the departure from Renault of Cyril Abiteboul F1
Where F1's calendar shuffling hurts its new drivers OPINION: Formula 1 endured major scheduling challenges thanks to the pandemic in 2020, but still managed to save its season. These difficulties remain in 2021 and create a tough knock-on effect for the championship's new arrivals F1
The image battle facing F1's 'nice guy' He's had his fingers burned by social media's keyboard warriors who have trouble appreciating that he's only human. But after two years in the intense spotlight Formula 1 brings, Lando Norris has no plans to change his outlook F1
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