i just bought a Grote Jazz ($169 hollowbody like the more spendy Epi 1966 with a single P-90 at the neck) just to explore P-90s. I had to replace the jack with a Switchcraft to get a good signal, but I have been playing it for a few weeks. I'm impressed by how wide the width of tones it provides. My question as a P-90 greenhorn, is what do I look for or seek by adjusting the poles? Right now it seems like a sweet low output single coil through a clean channel and a fierce wall of high output humbuckers through the gain channel. Feedback is somewhat elusive unless the amp volume is way up or I'm playing through my 2watt amp. The poles came with the outer string poles high and the middle strings low. What I want is more feedback predictability/adjustability. Admittedly, this has got to be a cheap P-90, but others give it a pretty good review and it does give me all of the sounds that I was expecting. Anyway, words of wisdom, direction and hints with the poles would be greatly appreciated from you P-90 enablers.