Anyone out there have experience installing a Bartolini 5.3 preamp harness? I've done other preamps before, but this is just driving me nuts. I can hook up my 2 Lane Poor MM Pickups to the blend pot and the switchcraft deep panel stereo jack and get sound in passive mode, but I can't get a thing out of the pre-amp. FYI I'm using a gotoh dual battery box wired in series for 18 volts of power. Please, can someone suggest something that might help?!! Thanks.