Anyone have info on the Channel switching mod for the original Bogber Helios?

[rpurdue]

Long shot here but does anyone have info on how to add the 3 way toggle on the Helios so you can channel switch from plexi clean to the hottest gain channel?
Thanks!

 

[gman1951]

I know you posted this a while back, but I just saw it. I do have some info regarding this mod and I've attached pdf document to this posting. Hope this helps.