Lol, having done over 40,000 stitches on sleeves alone, I WILL keep going, but the men in white coats may come and get me if I don't figure this neck soon! I had another attempt with scissors, tape, more graph paper and more youtubing, and believe the target is getting closer - even if it's not quite in sight yet!
Having never tried the picking up and continuing to knit the neck (just writing them off saying 'whoooah, way too big, back to the drawing board'), it hadn't occurred to me that that might tighten it up, so thanks for that handy tip. I'll give it a trial run to see if I can keep my sanity in tact!
Thank you both