Hi Tony01. Thank you for that insightful post, I appreciate it. Back in the day the Q-matic has the clutch on the jack shaft. You have a wealth of knowledge that I appreciate you share with us. You save us from making many mistakes. I was raised in Burlingame since 1951. It was mostly cow pastures with an insurance building. I moved to Santa Clara from 1980 - 2002. Don’t let those yuppies influence you unless you’re already one of them.