DIY: hot-wire foam cutter for making RC planes

Just what's involved in making your own hotwire foam cutter for RC model planes?
Well it's not really that hard, in fact anyone with basic soldering skills can build one.
Here's a look at the hot-wire foam cutter I use for making models out of EPS and EPP.
If there's enough interest, I'll post more information on this foam-cutter and show you how to cut your own foam wing-cores and other foam components.