Received these in the mail today, tried taking off the old ones before we left the house tonight with no success. The new ones come with regular nuts and bolts. But to get the old ones off, directions say drill from the bottom up thru the one piece holding in on, and use pliers if it turns from the top. Well, I drilled and it popped thru leaving the outer shell in place. I can’t get that off. Of course I’ll try again when I get off, just wondering if anyone else went thru this and knows a better way.