I plan on making my Epiphone Thunderbird IV Korea (mahagony body, 2 epi humbuckers) a project bass, and re-stringing it with 60-130 strings (BEAD strings from a fiver). So now, i started thinking about that B string. TBird is pretty....'muddy' as it is, so i fear things will go downhill with .130. So what kind of 4-string pickup would you recommend? Routing the body is ok with me, since there are just few drop-in replacements (Thunderbuckers etc, but they are all above 350e for a pair). I was thinking maybe MM pickup? At the local guitar store, they have a sale on SD Basslines, MM pickup is about 65e or smth). Any advices? Btw, i allready have a precision, so i have the 'standard' bass soundwise, this one will be used as a gigging backup, and for some downtuned metal