Had mine fitted before Oulton last week. On right handers seemed to be fine, on the two left handers (Cascades and Island?) pressure was dropping to 2 bar. Not sure that it is worse than before, - have only driven two track days before, but the pressure was dropping without the baffle at Surtees (LH) on the Brands GP circuit last September. However, it doesn't seem to have improved things much either...