It is looking like the removal of the remainder of the cab is not too complex. Having taken so much apart to get to identify the leak, going further when assistance is available will be within my capabilities. I will need to discover how to bleed the power steering as the manual only tells you to do it, not how.
If I were buying another UTV it would not be a Kubota. Unnecessary complexity everywhere. Ridiculously expensive parts. Stratospheric annual servicing costs if you use the dealer. Looks like I am stuck with this until I retire as I am 70 now. I got it at 2 years old and it had just had major work on the transmission, having been used by boy racers. The last 8 years have been sedate but I have had to change a front drive shaft and other small items. The steering delivery hose failing because of a design issue would have been totally predictable to Kubota. They probably thought it would be a revenue stream for their dealer servicing network.