Cobra Viper paired with a measurement ring

[*]DH first cage is a Kink3D Viper with a size XD 3 ring. He is high and tight. Overnights has had several ball slips. Ouch! After getting Quite Excited while trying a size 2 sizing ring from MM, I suggested he try putting the cage back on while keeping the sizing ring on too. Worked like a charm. No ball escape last night. Have a size 2 base ring on order now. We are working our way toward the MM Jailbird and I’m doing searches about double rings. Any insight v welcome; ) kH