Yes, Ian, all true....the idea is for me to have a 2nd blade at hand to use whilst the other one is being sharpened. I live in a rural area and it is a long way to the only saw sharpener on the Tablelands. My plan is to take all my blades in at once on a regular basis and use duplicates to keep me woodworking. I am delighted I have traced an original Triton blade through this forum.