I did tell him the distance and that I would try my best, and I did keep him posted on my progress - when in a safe place to do so as I was driving. 2 other asistants had already pulled out due to not being able to make the location after work.
Just wonder at what point we realise (and may accept) that we can not go any further, and thus can stick with maintaining the current potision at the ceiling. For some it may be 6, some 5 and some 4. I expect that for many refs ther are a mixture of "I want to go to the top and nothing can stop me (but not taking into account age, fitness, eyesight or life commitments)" and some who are not going to go any further regardless how hard they try.