Spoke to him on the phone but ... as he hadn't done an Armstrong he couldn't help. He suggested I buy one off e bay and set it up myself ... Can't get to see him as I'm in the Far north of Bonnie Scotland. The carbs and the main and pilot jets are available on e bay but do the slides, needles etc need changing as well? I may give it a go as I feel I can set up a carb as long as I have a base to start with