With their pit stop woes the first step in Max Verstappen's Italian GP crash, Christian Horner say it is 'annoying' when Technical Directives change procedures mid-season. Earlier this year the FIA announced a new Technical Directive for pit stops, the aim being to make them fractionally slower and, hopefully, safer. The TD related to a button on the wheel gun that the crew member changing the tyre presses to let the jack man at the front know that he is done. In the past this could be pressed even before the mechanic began tightening the wheels, now in order to slow the process down, this button only works after the wheel has been tightened. But, if it is pressed prematurely, as happened...
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