The million-copy selling truck fitter returns***Featured on Channel 4***'I can't stop biting off more than I can chew. Maybe I'm wearing everything out, but I believe the body is a fantastic thing and it will repair itself and I'll go again. If it's running too rich, I don't stop what I'm doing, just weaken the mixture and carry on.'Since we last heard from him, Guy Martin has restored a 1983 Will...