Hi Matt,
Firstly thanks for the response.
I think I'm correct in saying that the Pram bar was an option available aimed at people that just had a straight flat lawn without any turns or twists, much like a bowling green.
As far as the Supercut is concerned I've started to restore my Model 17 that is completely original with its Villiers 412 engine. I'm doing it basically as a restoration of a piece of Australia's mowing history and definitely not to be used as a daily driver. My two 45's I have (14 & 17 inch)are far easier to use that's for sure.
Did you ever get a toolbox bolted to the handle bar of your Supercut ?
Cheers,
BB