I've been working on Kirks 'Ultimate stretching excersise' tonight for the last hour or so, I got fast enough so that I can just about complete the B scale in the same time it takes Kirk to complete ALL 12 scales

and my fretting hand really aches.
I also made the enlightening discovery that f# and Gb are the same thing, as are A# and Bb etc, .. well I didn't know!!

I'm just beginning to grasp the tone semitone thing, even us oldies can learn!!