I have 2 Hamer Cruise Bass's (an almost J style bass). Is there any real benefit to routing the neck pup cavity(and covering any left over holes with a new pickguard) to fit a split P and making it into a PJ bass? Or is a split P in that position not really that big a difference? I've tried the DiMarzio Model J in that position, didn't really hear that much difference from my stock Seymour Duncan Vintage SJB-1 pups. Is it that big square shape of the split P pups that gives the P-pup the P tone?