I just found the greatest set of Stirling SMG scratch build templates I've ever seen. They are leagues ahead of the BBC ones and produce an exact 1:1 scale replica. Best of all they don't just rely on you to print the sheets out correctly, they include all the measurements taken from a real Sterling right down to the length and diameter of the cocking handle, as you can see in these preview shots:
These things are so detailed, they also include the full interior parts and you can actually build a functioning Airsoft gun from them if you are so inclined.
I purchased them from an Airsoft replica site, but since $8 (while cheap) is a bit of a rip to have a PDF file emailed to you, what's a fella to do except post them up here for all my TK brothers to download for free.
Attached here:
SterlingSMGPlansApr09.zip