No mate, I watched a few tutorials on youtube, I held the tip of the iron against the prong on the switch for a short while then placed the wire against the prong, as soon as it melted I let it fill the hole till about 3mm, then I removed the wire and slowly lifted the iron away to leave that dome shape. I was also careful to keep the end of the iron clean with a special sponge I bought from maplin. I never realised just how fiddly soldering is! and time consuming,