I followed the video and removed the old supports. I didn't have a putty knife so I just used a table knife (butter knife). They popped out fairly easily, two I had to pull out with pliers. I put the new supports in and tapped them into place with a hammer. One would not go in and I ended up ruining 2 supports before I back tracked and found that I had not quite removed all of the old support. After properly clearing out the opening the new support went in without a problem.