Lipsync upgrade.. Ok so where is it!

Just downloaded firmware release 1.3 for my G68 and it won't let me increase lipsync above the previous limit of 30ms. Have I missed something? Gotta say that its a bit unnerving watching firmware downloads as they progress with a 'bad program' message that is until the final element! Anyone else managed to get the improved lipsync?

Rod

818v3, QNAP HS-453DX, Roon, 7200SE, ARCAM AVR380, REL B2, Panasonic BD 80, LG OLED, SBox Transporter, iPad, F80. Shunyata Delta NR power cables.