Calum are you hatching a plan that needs a sprocket?
More that I am having tooth jumping issues which are not going away despite the rest of that part of the drivetrain being new, tight and aligned etc. My front sprocket is quite noticeably worn and had done so many miles on the original hub with the belt hanging off the side of the rear sprocket that there is a degree of unevenness to the wear so I want to stick a fresh front sprocket on and hopefully sort it out. If it doesn't work then I will go to Plan B.