Is the axle on a ropeman mk1/2 strong enough for the decice to be used as an autolock pulley? I have just set this up as for crevasse rescue, and as you would normally either have to have a prussik on the krab that the rescuee is hanging on or use a microtraxion, can you not simple rig it up so the rope travels up around and down through a rope man, turning it into an autolock 'pulley' (though I am aware it does not have the friction reducing advantage of actually having a rotating wheel there).
There is a picture here if you want to see what I mean.
https://www.dropbox.com/s/vzn5da8r3zbrk1w/2013-04-17%2014.16.57.jpg