Yep - - and so far, using "Minimum" has produced the best results. But it's pretty cool - - as you can see from the "Pic" (click on and "enlarge") - - I can dial in pretty much what I want and I set it up so I can see the settings from just below my projector.
Again - - thanks so much for all your great suggestions. The 67MM lens adapter ring really works the best - - at least for me. And it's very secure on the outside of my BenQ W1080ST projector - - even without any Silicone glue.
Now - - with really bright source material - - I can dial in between ND2 and ND4 to suit my tastes.