I think that is a misinterpretation or misremembered, TBH. There was no reason for the new transmission to change anything in the ergonomics of the car. I can't remember how much Michele drove the car before Brazil, if at all. I do remember a shakedown at the Ford test track in Essex but that was probably with JP. Those cars were stupidly tight in the cockpit and I suspect it was just a case that we got the seating position wrong, and it didn't come to light until he drove the car for an extended period in Brazil. When doing seat fits it is very often elbow clearance that needs enhancement once the driver has actually driven the car for the first time. You have to satisfy two somewhat conflicting requirements simultaneously. The driver needs the side of the seat to come up reasonably high to provide lateral support, but then he needs clearance for his arms to sweep back and forwards along the side of his chest as he steers. This is more of a problem these days with modern resin matrix foam bead seats because they tend to need a bit of thickness in that area to give them stiffness and resilience. It's not insurmountable, it's just a bit of an iterative process to get adequate clearance.