RE: correct type of solder?
One of the easiest to use is the Staybrite Silver solder but you can also use acid core solder on the structural stuff like landing gear and flying wires, just be sure to thoroughly clean it after soldering or corrosion will undue all your work in a short time. As mentioned above, clean, clean and then clean some more before soldering to get a good joint. You do need a good iron of at least 60 to 100 watts for good soldering on music wire or similar material.