Thanks Max. I'm mowing on 10 to 20 degree slopes at times so the sulky would be dicey.
I've not been able to find the drive dogs available anywhere. I've looked at the BBT slasher mower sold in Australia and the self propelled mechanism on it seems to be similar.
They sell their "Wheel Crawlers" as a spare part but the dimensions look wrong. I'll continue to look for some old stock.
Thanks again for your help.
