I've always wondered why a company would spend a small fortune to develop a RD and then provide you with a flimsy mount with flimsy suction cups.
I was in Home Depot and found some suction cups that looked about the right size but much sturdier than the ones I got with my Escort RD. They fit perfect. I have not had them very long but they sure suck and grip a lot stronger than the ones that came from Escort. Cost is $2 for a pack of 4. Passing info along to those frustrated with their flimsy and finicky Escort cups.