The Hinwil team had a new front wing in Australia and a revised beam wing in Miami, but Bottas says that more is needed in order to move the C43 further up the grid.
Bottas has highlighted race pace as a weakness, the Finn having finished 13th in the Miami event after making Q3.
"For some reason on a single lap on the soft tyre, we were strong, but then in the long run, I think that's where ...
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