According to everything I had read about this bike it orginally came with a 122.5 and my local LBS tells me it's the right size. I bought a Cyclone NOS MkII rear off ebay sight unseen as well based upon a Specialized Expedition bike out of California that is regularly shown on the BF. You are right I think there are several versions of the MKII because I pretty sure the one I recieved is for a double.
Also several early high end mountain bikes came MKII equiped so I made a false assumption they were all for triples. Now it is just a new addition to my part box!!