Re: Vintage Gibson Mod...(no faint hearts please)
I've fitted a several varitone kits from Torres Engineering in LP and 335 type guitars (you can find all the details on their website) and it's a piece of cake (two wires and no battery), but remember, the varitone switch body is relatively fat, but not much more than a normal Gibson pot. The thread length is relatively short, but it's only a problem on Les Pauls that need long thread pots. I also have an Aria pro III Thorsound that has one as standard and it's what got me hooked on these - the varitions are endless (mind you, the Aria also has seperate single/parallel/humbucking switching options for both pickups and out of phase AND an on board preamp, fun or what?)
As for the sound, I use a three of them most of the time and all of them some of the time - you do get a wide range and buckets of mids. Some of the positions can be a bit nasal and some guys don't like that, but you won't be disappointed.
The main difference with the mid boost alternative is you can wire a push/push pot to bring it in and that's easier on stage if you need it then and there compared with a rotary multi switch.
Nice looking guitar by the way - clips when it's done???