I am soooo embarassed I've only just come across this thread,
Chucky, this work is just amazing! There are just so much love put into these sketches. Goodness knows how many hours you spent at the eyepiece.
I like the techniques you've described. "if you think you see something, put it down. You can always confirm or remove it later". Excellent idea as this can be applied to all sketching. With really faint DSO's, or even a bright GC, many details come and go according to the preveiling conditions. On many occasions I've found myself in a similar situation where concentrating on a certian feature, my eye's have picked up something else, and I stubbornly insisted on what I had been looking at and lost that glimpsed detail,
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Hat's off you your work!
Alex.