This is a Farmer's busiest time of the year. 18 hours a day, 7 days a week is not unusual
That doesn't give a great deal of time to be skiving off to the hangar.
AFAIK, all is now finished and the intrepid duo are awaiting the return of the necessary paperwork, without which the Turb cannot (legally)fly.
Do a search "cowshed continued" on the other site....it was still there last night