I need to remove a 30 yo kitchenaid disposal. It has an old style 3 screw mount an 2 tabs on the body flip onto the mount. Do I loosen the 3 screws to allow the disposal to be pushed up to flip the tabs, or do I use brute force to push up the disposal to free the tension on the tabs. Someone with past experience with this type of mount will surely know the answer.Thanks.