Honda CRV Tire Problem

BC, Thank you for responding to my CR-V tire/alignment issue. The problem came to light at 20,000 miles when I went in for an oil change and tire rotation. I am now at 26,500 miles and still have the OE tires which still have good tread. Cupping on the inside edge of both rear tires produce an uncomfortable hum and slight vibration.
To answer your questions ? I didn?t get the alignment because it was checked and I was told it was within Honda specs. This was done with the OE tires still installed.
My plan is to replace the OE tires in the spring however I want to make sure any alignment issue has been resolved. I don?t want the new tires to cup or wear unevenly. Do you have any advice on the camber adjustment kit? Thanks in advance.