AMK nice long run at below MP pace. Sorry for unsolicited advice just cant help myself. I see your training a lot like Ed Whitlock. You have a huge aerobic engine which is great for the marathon but I also think you spend too much time on the edge aggravating your achilles heel insertion issue. If you just use that heel to guide your training you will get your best result. For example your heel is indicating that long run you did was probably too hard .
Thanks for the advice, but actually my heel has been feeling surprisingly better than usual over the past 8 weeks or so, which has allowed me to push the mileage up. During all of last year's marathon training every long run left me too sore to run at all the next day. But recently I've done two 18+ and one 20+ and the heel has come out feeling no worse than usual. After yesterday's long run my heel feels as good as it ever does, but I'm just systemically tired. I have no illusions that the heel problem is fixed or even permanently better, and I really wish I knew what I've been doing right over the past 8 weeks!
Olde Farte, good to see you ramping it back up successfully.