Adapting a Fixed Steady to fit our Colchester Triumph 2000 lathe (& why we needed it).

I'd been thinking about trying to make a fixed steady for our Colchester triumph 2000 lathe as we didn't have one & they seemed to be rare & expensive. But I'd taken this job on which really needed a steady, didn't have time to make one, so when I found one for sale on ebay described as a fixed steady for a Colchester 2000 lathe, i dashed off & bought it. Only it wasn't quite right!