As Dodgy says - leave that case closed! It is really easy to damage the circuit board if you overheat it and there is no way to practice it if you feel nervous about doing it. Then there's the issue with warranty, etc.
This is what you need. It's not easy without a little practice, but a few tries on some old gash pieces of wire and you soon get the hang of it.
http://www.modelaccessories.co.uk/st...et-futaba.html
And some spares to practice on...
http://www.modelaccessories.co.uk/st...45-pieces.html
With the plug and wire positioned correctly the tool makes sure you get a good crimp. I've done quite a few servos, speedos and extension leads and never had a correct crimp come loose or off. I've made a few mistakes along the way though and had to redo a crimp. When the crimp doesn't grab the wire simple throw the plug away and do it again!
With this kit you can shorten, make extensions, repair damage and generally become a crimping God! HTH
