LMH - sounds like TR has a plan which will work for him, and seems dedicated enough to complete it - a simple mini-LMH-version is what you need. As he says (and he is a wise old chap), the hardest bit is stopping running and focussing on doing the other stuff that will help when the running starts again.
Padams - not sandbagging at all I'm afraid. A dose of the lurgi which hasn't shifted much in a week, lack of quality, a helpful of old age, and knowing that Njord will have beers in the house on the Saturday night pre-race all add up to a healthy helping of realism. 6M at MP on Monday felt more like 6M at 10k effort
LMH - rotten news, I feel for you. It has always been my knee that has caused me problems - always cartilage related. Are you allowed to x-train/bike? I was, and it kept me sane (or at least less mad than if I had done nothing at all!), I remember a 3 hour x-training session with great fondness. Not.
Strating my taper for Sunday's Chester Marathon - pretty certain I'm not in sub3 shape due to a lack of MP/race-pace work, so it won't be pretty.
Entirely depends on the terrain/weather conditions, mandatory kitlist, how long you expect to run, how much fluid/nutrition you'll expect to want during the race. Number of checkpoints/dropbag facilities. Personally, I've done 50k's before with nothing apart from water at checkpoints. Even with that advice in mind, you won't know how comfortable any model is until you've actually tried it on, so go into a shop and try a few on.