Mr. Becker wrote me before that MKII and MKIII were exactly the same save extra muting circuit. The power supply may be bigger but the specification is the same. I used to have pop with now Al's RKV, but after changing the PS caps to something better but still inexpensive like Panasonics (not sure what my friend did), the pop disappears. That's why I urge people to scoop MKII cheap while still can. In addition, the blue PS caps in MKIII simply destroy the harmonic color combo of black and red in MK II.
Dusty, don't worry about biasing as its auto-biased (nice!). Just make sure you plug a matched pair in one channel as it's PP design.