Robomow drive shaft

I had heard my Robomow squeeking while it mowed one day and noticed that the right wheel was very wobly. I removed the wheel and found the driveshaft broken inside and therefore searched online to find a supplier. Danish suppliers could only sell it included with the motor and british supplier didn't know if it was in stock. Buying it in the states would mean high cost for shipping, import taxes, local taxes, so I sat down and drew up a simple cad. I had it printed, mounted and running within an