Wenty, that reminds me when you mention the driving thing.
One time I managed to squeeze in a quick run straight before driving up north on business. That was definitely uncomfortable and, if I remember, I ended up sitting on one hand whilst driving to ease the discomfort.
Wenty - I have had it since my training for the 2010 Marathon. I think 20 mile runs in the ice and snow of that winter started it off and I have had it ever since. Tried all the things you mention but I don't do stretching and I don't want to pay for physios. If any of them I would say the ball is probably the most use. If desperate I now and then use a tennis ball.
In 2010 I did wonder if it would be much worse during the race but it was fine and I did my first sub 3
In the end I just use it as part of my mental toughness training. If you can put up with that pain and discomfort just on training runs it will be no problem when it comes to race day.
In the past I have resorted to a couple of pain killers before long training runs, but not these days and never for the race.
Mine only hurts when I run. It stops hurting pretty much when I finish the run. It doesn't stop me running. I have chose to run so its a question of just "sucking it up".
So, basically I get through to the taper doing whatever it takes. It eases because of the taper and probably the warmer weather and during the race I am used to that pain from my training. It didn't stop me then so it sure as hell isn't going to stop me now and so far it has been fine in the 3 marathons I have done with it.
Other than track sessions I never run at the sort of pace you mention, mine is worse for the second half of long runs usually.
My advice would be:
Cut out the superfast work that is aggravating the problem - at least for the taper if not sooner.
See how you get on with a tennis ball.
Rely on the taper to ease the problem.
On race day, based on my own experience, you won't even think about it.
I am with Wenty on that one. At my age if I listened to my body I probably wouldn't even get out of bed let alone run.
I have got used to my heavy and aching legs for the whole of the months of training. Add to that my ongoing left piriformis/hips pains. The aching right knee from my footballing days and the odd reminder of my old left achilles injury at the end of long runs - ohh and then of course there is my aching shoulder that is a result of a heavy fall having been tripped from behind at last years marathon.
Other than that absolutely fine!!!
David - your preparation looks spot on, you deserve to do well.