The last time I used one of Davids sets (the original Tornado Sets for the old Revell kit) I used solder paste, a toothpick to apply, and a cheap pen sized gas torch to apply a gentle waft of pinpoint heat. Solder paste goes from grey sludge to shiny silver as soon as it's melted and solidified.
It will also form neat 'welds' along things like the inside joints on ejector seat pans - fold and clamp seat - apply some paste along joint with toothpick/cocktail stick - wave the torch flame up and down the joint - solder should run into joint bu capillary action and form it's one consistent level. Use small file if require top clean up.
Make sure mating surfaces are nice and clean before you start.
All on an old brick to save the bench and clamped in a small steel vice if required.
Really easy, really fast, really strong - and fine for those little pieces...
Not sure how widely available solder paste is these days - last tube I bought in the early '90s - must see if I can get some more...
Iain
32SIG http://www.skywriters.net