I am still using the same suction cups and cam levers on the very first shaper I ever built back in 9/16. I haven't had a customer call and say they have worn out the cups yet. I do get broken cam lever calls every now and then, but am adding a new feature this year that I hope will eliminate that. I say keep on using yours. As long as the rubber is soft and pliable it will continue to hold unless it simply falls apart. Haven't seen or heard of that, but anything is possible. Yes, I have had them on sale for a couple months. Probably stay at this price until the end of March or so.