so how does one do a spot of bloodletting if so inclined? You make it sound like it isn't too tricky - I assume you mean a self phlebotomy?Then people should bloodlet at home once or twice a week if their ferritin is that high, until it goes under 100, then donate blood to keep it low.
Last year my front door slammed in the wind onto my fingers and one of my regrets was not letting it bleed out into a cup so I could measure off a couple of pints before binding it and raising the hand to stop the bleed. But sometimes one doesn't think straight. Don't ever let a good crisis go to waste. I wouldn't make a good politician.