Behringer Xenyx QX1832 USB B-Stock

I had a Behringer Xenyx X1222 for the last two years mostly for Karaoke gigs and i found it very good especially for 2-track fader feature.So i decided to upgrade it with A Behringer Xenyx QX1832 and i was very disapointed that doesn't have a fader/knob to control level of usb/rca inputs to mains.Despite its other great features i have to send it back (because not suitable for my needs) and to purchase a new one.