Well rather than a new cage it sounds like a lubrication problem. So I’d try that before you do anything else. Get a good silicon lube and put some on your willy before you slide the cage on, and add more around the whole base where the ring goes. Because it’s silicon it basically stays slippery for ages and will keep you moving around smoothly in it. Sticking is bad, you don’t want sticking! What you do want is a nice tight fit, so persevere with this for now.