i'm thinking of buying a second neck for my now fretless 72 P frankenbass. is there a difference in the MIA and MIM neck tone wise, or wood/ quality wise? also, a jazz neck fits on the p bass right? i now the opposite works. i would like to get a maple FB possibly a onepeice like it originally had. but they are so much money. just a neck cost half of the total price of the bass!