Here's a new patch I came up with. the patch closely duplicates the heavy sounds of a boss md-2 mega distortion with a noise gate added for reduced noise.
Mega bass distortion
Section 1: znr: thresh: 17, detect: efxln, level: 100
Section 2: overdrive: gain: 70, tone: 30, level: 100, balance: 25
Section 3: fliptop: bass : 4, mid: 4, treble: 3, midfq: 300hz, gain: 45, level: 80, ultra: low, cab: ag8x10, mix: 50
Mega bass distortion
Section 1: znr: thresh: 17, detect: efxln, level: 100
Section 2: overdrive: gain: 70, tone: 30, level: 100, balance: 25
Section 3: fliptop: bass : 4, mid: 4, treble: 3, midfq: 300hz, gain: 45, level: 80, ultra: low, cab: ag8x10, mix: 50