Great I-M, and I agree - hence my references to using CHR and NASA-TLX as well as the flight mechanics tasks. Cooper Harper task construction will be a really major part of getting this right, and I can foresee a fairly robust round table on that subject.
Continued sympathies on the sad and undeserved death of the chippie. If we can meet at a suitable airfield or you're heading south, we could standardise by doing my Stinson together.
G