A small update: I am now routinely working outside every day for up to 10 hours. Things like gardening, fixing the pond, painting the outside of the house... They may look small, but they are a massive improvement over where I was back in March.
My weight has gone down to... well, let's just say my wife bought me a new belt.
I'm now down to a body fat percentage of 14% just by eating healthily. I cook most days, do the shopping etc.
The swelling in my ankles (oedema), which was quite bad in the last few years, and is normally worsened by standing a lot and by warm weather, has completely disappeared. I take from this that circulation in/to my feet has improved too. I still apply some lotion (magnesium) every evening to inspect my feet.
After 10 hours of running around I do still feel some pain, and I may take a painkiller depending on the day, but mostly I can get by without them. Most important is that as long as I keep moving/working, I am
no longer bothered by my PN. In fact, I don't think about it most of the day, and it's only when I sit down for dinner that I might notice pain. However, that might also partly be normal muscle/joint pain.
I still take B12, B1, R-ALA, and biotin daily (and will restart D3 in September or October). I also take what most would consider a ridiculous dose of DHA/EPA. I won't bother you with my "diet", but what's important is that it's mostly cooked with olive oil, reduced or eliminated most starches and grains, and garlic, ginger, turmeric (all fresh) are used in abundance. I also started taking half of a baby aspirin (about 40 mg) a day.
Looking back, I might not have chosen the word "heal" in the thread title. My EMG clearly showed that there are still problems with my nerves (and those would still be classed as polyneuropathy), and this may take a long time still to heal - and it may not. I do think however that I'm doing the right things to manage vitamins/inflammation/circulation which has drastically reduced the resulting pain, so much so that I'm no longer debilitated by it.