YES! Illumination at last!!!
I wondered all my life what the heck that strange sound on the left channel right after the first "´cos I´m going to...". It´s nothing more and nothing less than the Mark II (or is it Mark V´s?) Guitar. It´s also the sound that makes the pitch drop (and NOT the flute, like Paul showcased so many times).
A friend passed me a copy of the old Ultra Rare Trax Vol II, and there´s a great version with many basic takes. And lots of tron in each one!!!
have fun!
Herman
M400S #1396