Any new pulleys need not necessarily have circlip grooves in them, collars with grub screws perhaps?Yeah they are ally. No massive rush as I am off work now for a week and the balancing machine is being shipped on wednesday. We managed to find 2 decent enough pulleys in the workshop so will make do and see how they go. We are going to need some pulleys making to a the same spec for a new balancing machine we are making. If anyone wants to give me a price that would be lovely.