I'd love to try and build my own but don't know what to get (electronics wise).
Thanks
That's a beast mate. Top job!
Its not to hard to build a box mod using the SX chip, can be done with basic tools and its easier to start with a plastic enclosure as they are easier to modify. All you need really is semi good soldering iron and a multi-tool.
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Parts list.
Firing Button
SX350 chip
battery holder
510 connector
Wattage buttons optimal
SX350 chip comes wired so all you have to do is solder the battery holder and 510.