D'you know Sheddy, that was the clearest, most concise description I've read about shifting series gearboxes. People usually ramble on 'till you could be in 6th overdriven middle box for all you know! Good work.
Oh, & Gavin, don't go driving about on tarmac in high 4WD or you'll get "wind up" and hear an expensive "twang"!
Best,
Marcus.