My first post here. I have an Epiphone "Allen Woody" Rumblekat. All is good with it. Bought it second hand with correct hard case about 2 months ago here in Australia. One thing that I don't get is that my neck pick up has six screw, or pole pieces instead of the four that are on the bridge. All photos I've seen of the instrument have them four for both. What's the difference? Can someone explain it to me?