The soldering gun is the best foam tool you can have when building a foam wing or just shapeing. You form the wire to what you want to cut, from wheel wells to servo extention channels and spar slots. When cutting wheel wells, place the wire close but not touching for fine cuts. You can make them as long as you need but do not force the cut. Takes a little practice.
Larry K

The only thing I do not like about the saw is they make such a mess