No I've used a Tap before.. I'm using the Indy Rockers for now But I have the Harlmsharpes from my other motor that I sold. Just haven't put them on yet.. I just feel if I'm not having a problem with oil control up top why should I mess with it.. Like if it ain't broke don't fix it type.. I don't know.. Maybe I'll order more fittings and mess with them..