I am struck while digging through The Who tabs site (I have viewed this site many times but it has been a while) just how quickly John's gear changed and how far he was trying to push the envelope of the bass guitar and amplification, especially in the early years. He would try most anything, the most glaring obvious dead end is that Grestch bass. I have played one of those...................................what a dog you may as well play a upright. Just bringing this topic up reinforces what a innovator he was.