Jons Nightmare 6 Wheel Differential Unit

Dear God on a Bike🤬
On the 6th March this year Customer Jon turned up with his "Quite poorly" 6 wheel drive through Differential unit - and asked us if we could please save it .
He was here as we took it apart, he could see the issues, some obviously quite severe, but, as we later found out as we worked around saving and rebuilding it - it threw one major challenge / issue / both and problems / the lot - every time we went near it.
A HUGE amount of time and effort went it to getting it to work again, it was obvious in its past it had serious problems, and suffered serious bodges which we had to correct repair improvise and work through.
As a business this was not in anyway "Profitable".
But it was without a doubt massively rewarding real sense of achievement to have not just saved this unit but upgraded it when nobody else wanted to get involved.
Ok, .....yes, ........no.....we don't learn 🤦🤦