Thanks to everyone.
I'm going to have a play around with it and see how I get on.
In the meantime and to get this kit built to the standard I want, I've oderered Karaya's pre-formed jackets for the LMG08/15 and LMG14.
A small price to pay, but They'll save me a lot of trouble until I get the hang of it.
I can add some photos and a write up when they arrive.
I also got myself a butane burner/soldering iron tool over the weekend. Should help with annealing.