I couldnt agree more with the above sentiments.
I really cant see the point of all this effort that goes into homing in on a target more and more precisely as the race gets nearer.
It just creates pressure for no good reason.
As TR says, do the training, get tapered and stand on the start line in as good a shape as possible given whatever circumstances have occurred during the build up.
Then run the race as though you have no access to any time feedback by getting the effort levels right. Whatever comes out of the other end will probably be at least as good as what would have been achieved through chasing an agonised over target and a whole lot less pressured into the bargain.
To answer your question, Keir, as far as 2:45 is concerned I would class it in the 'I wouldnt rule it out at this stage' category but that is far from saying that it is THE target.
I would be happy with 2:53, a comeback PB, even more happy with 2:47, an all time PB and would be absolutely over the moon with anything near 2:45, so will just give it my best shot and see what it throws up.
I initially gave myself four marathons to see if I could land a 2:45 as a V45, which seemed liked a very tall mountain to climb, so the fact that it is even vaguely on the cards this time around is a really nice position to be in.
It is promising that you are indeed managing to string a decent run of successive days together while managing the aches and pains. I know you feel like you've missed a lot but you've also done plenty as well so it may well be that you get to VLM with full strength tendons/ligaments/muscles and surprise yourself on the day.