CVT weight question

Most of my riding is rocky/bumpy trails in the mountains of New Mexico. Elevation is between 4,000-8,000 ft.
I tend to ride around 15-20 MPH. I installed 1.5mm shims to lower the powerband for slow climbing. I would like the ATV to "upshift" sooner to lower the RPMs for quiet cruising. I don’t care about power loss due to gearing. If my understanding of the CVT mechanism is correct, I would want to install heavier weights to allow the primary clutch to squeeze together sooner to accomplish this.

Two questions:
1. Is my thinking on this correct?
2. If "yes" to above, what weights would you suggest?

2012 Grizzly 550
1.5mm shims
2006 Polaris Sportsman X2 rear shocks (much improved ride)
swaybar delete
25" SwampWitch tires