Hi again SBM, Re: the sprockets....I would have liked a more close-up pic of the sprockets, but from the pic you supplied, I would agree that the top (small) primary sprocket and the double cutter sprocket plus the primary chain, will all need replacing.
Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member. Kindest Regards, Darryl