Next grab a utility knife and remove plastic fins from the bottom of the lid. We're looking to remove all the fins that create X patterns in the center of the lid, as well as the rectangular ones to the front and rear of that area. This should be an 8" by 11" area. We want the side fins left in place to help hold the board we'll be using in position under the plastic lid. We're removing the sections to the front and rear in order to use a longer board so that when we pull or push on the tap handles there's more working against the leverage. The idea is that we'll get a better more stable feel out of the tower during use if we don't have plastic flexing underneath it but instead have a solid board thats sealed and screwed into place.