I finally built that little devil! And it sounds cool. I used this schematic:
I put some extra switches so I can use the tap of the inductor or the whole inductor (TL019) for extra versatility. Also I can switch off the inductor and use the VIAB like a simple tone control with 6 capacitors to choose from. The caps I used are 1nF/3.3nF/10nF/47nF/0.22uF/1uF. There is a DEPTH control that adjusts the effect of the VIAB. I made that thing true bypass.
I recorded some clips with my geetard (Epi LP with bridge lipstick humbucker) and my Epi Tbird (full pups on), enjoy and excuse for my sloppyness.
(no-choike clips are with the inductor switched off, full-choke are with the inductor on its highest value -that's 7.70H- and half-choke are with the inductor on its lowest value -that's 1.60H. All clips are with the DEPTH full on for extra effect. Last 2 positions of the VIAB are VERY quiet)
edit: I tried to upload the files but I can't, it says the maximum filesize for attachments is 192kb!