Another good post, olly. Sorry if I seem to be nitpicking your posts, and this is a pretty nitpicky point:
The sixth note of G minor is bE, not #D. They are the same note. Or to use the fancy terminology, they are enharmonic.
"If we take the Minor Pentatonic - which is most used then we miss the 2nd and 6th note out. In the example of G Minor then you would in fact miss out the A and D# note."
G minor is:
G, A, bB, C, D, bE, F, G - two flats.
The trick is always count by letters - D is always going to be the fifth of G, even if it has 1 or 2 flats or sharps.
G,A,bB, C, D, #D, F, G isn't right - you have to go by letters, no repeitions.
This may seem petty, but it does help sometimes; when you look at scales like #A major (which really should just be bB major). In notation, double sharps and flats are usually changed in modern music to the same (enharmonic) note to avoid being overly complicated: (a bbB would just be A).
Anyway, that's what the voices told me to say.
See ya