i hope that Lyle Caldwells doesnt mind this. hes been helping me with my jazz bass. he sent me this earlyer today. i have a jazz bass that i added a p in to i wanted to have a blend knob for the two j's and a master volume for them. then on a stacked knob have tone for all pickups and volume for the p. i wired it as the drawing showed. only thing i couldnt figure out is were do i solder the wire from the blend pot to the back of it.there no place to. i had that wire conect to the back of the master volume and ran a wire from the back of that to the back of the stacked pot;then i connected the bridge ground to that. but now i have some werid problem. when i have the master volume down for the j's u hear nothing . even if the p is fullon nothing. if i have the p pickup volume all the way down u dont hear the j's.