Personally for me it is Sepang 5 and 6, I tend to react too hard turning into 5 which screws up my entrance into six and ends up treating them both like hairpins instead of a smooth line through.
Also turn 12 at Catalunya, I have so much trouble keeping any kind of momentum through it, just end up idling through and losing a ton of time
Also turn 12 at Catalunya, I have so much trouble keeping any kind of momentum through it, just end up idling through and losing a ton of time