HR. I agree with LD. In order for the science to have moved on in 15 years there would have to have been some in the first place. It's more of an art. Noakes does a nice job of debunking lots of it. If we were to compile a list of established truths of training i dont think there would be more than a dozen entries. One of the more interesting bits is the accounts of training histories of the greats. Shows a surprising amount of variety that can lead to great results and with a common theme that many push too far and break.
This lack of scientific principles leads folks like me to run 9x in last five days, including one treadmill session, with 4 gym sessions. Not training for anything, all just for fun.
PP. Sorry to hear of your problem, but hopefully has a resolution?
CW. I have heard a few tales of folks who heavily modify their shoes- ie chop big bits off of them that they think are non-functional, or impeding their comfort. If I recall Bruce Fordyce was one of them. I know how you hate tinkering around with things, but maybe this could work for you?