Right - I’m gonna take them up on a bit of reversing practice. But probably leave the coupling alone. I work as a relief driver - a certain number of class 1 and 2 drivers need to be there for contractual reasons, and in reality none of us do more than an hours work in a 12 hour shift. We are simply there because of the huge penalties for the company is they don’t get a load to another site 5 miles away in the same city within a timeframe. Usually, I just sleep or read my book.
Worst case scenario it’s no use. Best case it’s a bit of help. Just need to work out when I’m next there and text one of the lads asking to take them up on the offer 
Cheers everyone.