you give so much, and what do you get in return?
It's true! Bernhard is the most terribly helpful person in piano forum - any question I ever have gets answered thoughtfully and fascinatingly (if that's a word).
My piano teacher gave me a memorizing technique which I have found incredibly useful: You take a section of the piece, and play the first measure. Then you count through the second measure WITHOUT PLAYING it, followed by playing the third measure. So, in essence, you are only playing every other measure. When you attempt to do this from memory, it requires you to really know your piece, and have it down in your head to be able to recall it and think through the "silent" measures.
I suspect the amazing Bernhard has studied some works on memory, for example, the books of Harry Lorayne; he refers to the same principles as Lorayne and other experts