I've got an old Vyper too and never been happy with it. Might just be me..not a great techy, but very few presets sound any good to me and almost too many options. Got a sanperra pedal for it last year and gave up on that too. The loop time far too short for any decent play along and I couldn't figure out how to make it cut off so the loop finished and started on the beats. Yeah...it'll be me.