In reply to kevin k:
I climb with exactly this setup when I can't get a belayer. There are a few issues with using the mk1 ropeman for self belayed ascents though:
Firstly, you need to add some weight to the bottom of the rope so that the ropeman slides upwards easily, I do this by simply hitching up the slack rope and leaving it a meter from the ground.
Secondly, when climbing you should stop a few meters off the ground and tie an overhand knot bellow your ropeman so that in the event of it not locking in a fall you will not hit the ground.
Thirdly, I back-up my abseil loop with a sling.
I did e-mail wild country to check that using the ropeman for this purpose is ok but they didn't replay! I have taken plenty of falls and the ropeman has always locked straight away so I don't have too many issues with the system now.
I would like to know if anyone can see any advantages in using a Shunt instead?
Cheers