This earlier version was observed to become fewer than seamless in practice; once the SAT button was pressed, it could simulate stepped ratios and continue to be this way right up until the driver deselects it to return to standard, stepless CVT operation. Proton had found that transmission button modes https://gearboxcvtproton06171.therainblog.com/33336270/gearbox-cvt-proton-no-further-a-mystery