Ah yes, it’s been Christmas and you got one as a gift. Glad to hear you’re enjoying it. I have mine set fairly close to flat: bass at 2 o’clock, mid at 11 o’clock set to 300 Hz and treble at noon, grit at 9 o’clock set to B15 mode. Using a P bass with labella 750FS.
The Flex does sound a bit different (probably closer to the Broughton Fliptop) and I can’t decide which I prefer.