I do the same - put the card in, then do my paperwork and checks for 5 minutes minimum before moving off to get my trailer. Taking 5 minutes to check a solo unit is stretching it though, so I usually have a coffee too 
I do the same - put the card in, then do my paperwork and checks for 5 minutes minimum before moving off to get my trailer. Taking 5 minutes to check a solo unit is stretching it though, so I usually have a coffee too