FastFordChris - You know your stuff mate
I'm 21 now and have been training properly for about 2.5 years, I found it near impossible to put on weight and keep it on until about a year ago when i started using 'Dorian Yates Approved' Pro Mass. They sell it at GNC/Hollands etc and that pre workout is the only thing my body hasn't excessively burnt during/post workout along with proteins/amino's.
Gym i go to is owned by a British bodybuilder JD Dawodu who'd give me sooo many ideas none of them stuck with my metabolism. 5"11 and I couldn't get past 11.5 stone, now holding weight at 13
Worth a crack IMO.