I've finally found some suitable modern replacement blades that are a perfect fit for the KXD-2. They are Jet Fast "GA Spares" Part No. BLD289, which replaces P/N 900120. I reckon they would probably work better even than the original Southern Cross ones. Once again, if anyone fits these blades, please double check they are not hitting against any part of the base prior to using. I can report no problems on a KXD-2 that I have fitted with these blades.