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iFixit wants to fix the soldering iron
(www.engadget.com)
This is a most excellent place for technology news and articles.
That is pricey... However, as someone who has an ifixit toolkit that contains just about every shape and size of screwdriver bit ever imaginable (and several that defy explanation), it has been the most useful tool I have ever purchased. I can't even count how many times I've used it.
And the quality is outstanding.