Good job, Paul👍 Have you had a look which degrees celsius your new (and old) T are? should perhaps be engraved on the T. If I recall it right, somewhere around 82C?
Sorry Heinz, I haven't checked either. The annoying thing is that that old thermostat seemed fine but the rubber "gasket" had degraded. When I ran the engine up to temperature, the opening seemed to be the same as before.