As far as tables go - I've converted Headphones' into a google doc to make it easier to read/update. 

[url=https://docs.google.com/spreadsheets/d/1gXCnqisLsRgQfVRa4DEWxU2dhBbXWy_e9l_K5XHhpqI/edit#gid=0]https://docs.google.com/spreadsheets/d/1gXCnqisLsRgQfVRa4DEWxU2dhBbXWy_e9l_K5XHhpqI/edit#gid=0[/url]

I'm still working on it, but it should serve us OK I reckon.