Well, here's my finished build - still waiting on a few keycaps to replace the misc thumb pad placeholders, but you get the idea :)
Thanks to everyone's tips in the thread too, they all helped a lot. I installed SIP sockets as many suggested, so should the layout change, I can keep the colour coding without any soldering, just pull one LED out, and insert another :)
http://postimg.org/gallery/1g0062cle/
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I'll be putting a Hakko soldering iron onto ebay in the next day or so as I only bought it for this project and wanted to use a good one. (It was definitely worth it). As well as magnifying glass, and other accessories.
Thanks to everyone's tips in the thread too, they all helped a lot. I installed SIP sockets as many suggested, so should the layout change, I can keep the colour coding without any soldering, just pull one LED out, and insert another :)
http://postimg.org/gallery/1g0062cle/