Woo hoo. Delivery from Maplin arrives. The LED cluster fog lamp is superb!! Can't wait to see it flashed up. The whole order provides the parts for quite a few jobs that I can be going on with. The only problem was some tiny grommets to fit around the wires going into the cluster. I intended to get ones to carry 3mm cables but they're 3cm! Much too big. A trip to Fynepax should provide the little parts I'm missing.
Found a throttle return spring for a Weber DCOE I had kicking around. Looks like it could do the job for the ZX9 carbs. We shall see!