Well, my 500 arrived and I'm very happy. In fact ... I've now fallen in love twice !!!
The cane is a lovely colour, it's die straight, the guides are fine, the cork is excellent, and the only small niggle is that I can feel a small amount of movement on the female ferrule on the cane (but that's easily sorted).
What is fascinating is comparing it with my Allcock's "Harvey Torbett."
Both rods are of the same configuration, being separate handle with middle and tip sections.
The figures are as follows ...
Chapman's 500. Handle 24 inches. Tip taper 0.133 " - 0.281". Centre taper 0.322" - 0.422". Total weight 11.1 oz.
Harvey Torbett. Handle 25.5 inches. Tip taper 0.106" - 0.285". Centre taper 0.313" - 0.472". Total weight 11.9oz.
So ... "Harvey" starts thinner and ends thicker ... but only by a few thou.
What this means to me in practical terms is that I can now have both rods set up, the '500' (I'm tempted to call him 'John') with a pin for close float work, and 'Harvey' with a fixed spool for more distance.