Thanks all very much for the help and advice.
@ Sam Thompson - yes, I bought the SG a year and a half ago and quickly came across other folk's photos using the AE and checked them out - decided they were too expensive for me so was completely blown away by this guy's generosity in giving me it to me, free, gratis and for nothing.
@ Kenny - great, thanks! And thank you for the kind words. I look forward to using it :-)
@Francois - Wow, that sounds amazing and thank you but I'm afraid my DIY skills aren't up to much...hence all the lenses mounted on cardboard held on with gaffer tape ;-)