Looking through the parts I have in a little more detail, the cylinder I have is definitely Centaurus. This isn’t good news as I was hoping to swap it for the cylinder off a Hercules complete with matched internal parts. This might not be so easy now.

The sleeve drive for the rear bank of cylinders on the Centaurus is on the rear of the cylinder. I can see why they did it, but it doesn’t help me now. That’s the major give away as otherwise they’re the same.

I could of course use all Centaurus parts and make it 2.96 litres instead of 2.75. Or make two? A small one and a big one? Hmmm….