Not really universal, but this is the only one I can stand. Fender Telecaster® Electric Guitar Central -- No. 1 in the World
At the heart it is a Telecaster Fan Forum.
The thing about Tele-Lovers is that the 'Caster is a real basic solidbody
, It tends to draw a player who understands tone comes from the hands 1st... and equipment 2nd. Some real experienced strummers when it comes to a lot of sub topics.
Of course I am biased as I love Telecasters...