I'm about to build a custom bass from Elroi Guitars and I have some questions on what put on it... It will be a 5 strings neck trough bass. I was thinking on put a MM/P pickup configuration but I don't know if there is a P pickup for 5 strings... If there is no possibilities, I will go on MM/J In case of being a MM/J, I was also thinking on put the J pup close to the bridge and the MM 2 inches from the J. Are these configurations fine?