Well, another day - new strategy. To ignore Charlot and just work with his friends so that he can see they are not being killed by picking up their back feet!
We approached his back leg and he aimed as usual. Then we tried running a looped rope up and down the leg. We picked up the front leg using this rope and he was happy about that. We approached the back and he lamped out, bang! and we managed to get the rope around (you need a heavy rope) his back leg and ran it up and down like on this YouTube Video http://www.youtube.com/watch?v=bdfSQ_f0bA8
Surprisingly, we were quite successful. Just did the one back leg, gave him some food and left it at that. I think we need to look more into this back leg rope thing abit more - I wish that video had spent more time on the back legs rather than the fronts!