Thanks for answering the continued questions wce. Enjoy the getaway. I spent a decent bit of my childhood between Margs and Witchcliffe. I don't get down there nearly enough.
Jack, well, collectors do. I, however, only need one if I come across a mowing problem that needs a unique solution! I am keen to see just what HoC this was designed for.
I noticed the spilt roller on the one in question, but I also failed to register that it was unusual. Only a few more weeks and I'm off on annual leave for a while. Will head to INGS and see what they can do when it comes to parts replication.