One thing I was wondering about this tyre tread thickness we've had this year and 2019. Is the tyre made/moulded with the thinner tread depth, or is a normal tyre made and then 0.4mm shaved off of it?
What I'm getting at is, perhaps it's something the teams could have Pirelli do for them at the track. For example after Friday running a team might decide they prefer their remaining sets have a smaller tread depth. Could then a machine then take x mm off the tyres right there at the track? We'd have control tyres, but the teams would have a bit more ability to customise them to suit their needs.