i just installed a set of gfs mean 90 pups humbucker sized p90s in my prs hollow spruce. the neck is a rwrp pup, so im supposed to get a bsrop and a wah treble tone, maybe phase issues. i wired them the same way as my 57 classics, with one wire going to each side of the switch and the other wire (ground) on each going to the mid area of the switch. can anyone guide me into get these to sound and operated correctly? istnt the mid position is supposed to be a nice useable tone w/ these pups?