If you jump over to Curtis Suter's place http://www.tailwindgliders.com there are two excellent videos for sale. They are both of very good quality as well as very informative.
One of the videos cover the construction of pods and booms for gliders, but I think that at least some of the building techniques for pods are applicable to 1/2A fuselages. On the site is a sample from the pod-video showing how to reinforce the pod with fibre glass and Polycrylic (transparent floor paint). Very easy to do, very lightweight, and very strong. Up til now I've only made tests on testpieces with this building method and it turns out that HK's thinnest fibre glass cloth is too thin for my needs (unless I use two layers), but nevertheless I've got a very noticable enhancement in strength.
In the wing DVD Mr Suter shows how to cut foam cores, as well as how to sheet them or vacuum bag them. All is done in a way that makes even a noob like me feel I might eventually manage to produce a decent wing.
I have watched both DVDs several times and I still find them excellent and can honestly recommend them.
/Stefan
P.S. Did I say I really like the videos?