@ozzy It is my understanding that it varies by system and placement. I’d reach out to Bill for a better understanding / application for your situation. I’ve chosen to keep the top on. I'll PM you.
I’ve deleted my previous post. After re-reading...it comes off different than I intended.
Here’s the second try: Happy to hear your outcome @marc777
i always play with top off and notice instantly when top is put on or taken off. The harmonics seem to bloom, beginning sooner and lasting longer. Addictive soul food.