Tornado Playfield Trim Pieces
Every little part on the table matters in terms of creating a quality and consistent game. Luckily if you own a Tornado, the engineers that work for the organization have done a lot of research to make the best American-style product you can buy. There are two playfield trim pieces that are a little more than 4 feet long on the outer edges of the table surface as shown below. The tournament-grade tables built prior to 2008 came with two white playfield trim strips and the lower-end home models still come with this trim piece today. It was discovered this slightly sloped piece is the only part on the surface that didn't make the table completely flat. This means the balls that hit this strip would actually have a slight "hop" in the air. This little bit of lift could have an impact on the trajectory of the ball when doing a wall pass or a bank shot off the walls.
Invention of the Clear Playfield Strips
Around 2009 while a lot of other advancements were made to the tournament tables, a clear playfield strip was introduced to flatten the edges of the playfield and remove the bounce on the ball. The new clear-style edge no longer has a sloped edge and is similar to a thin piece of scotch tape. If you are looking to either replace your white trim or upgrade to the new clear style, you can find these replacement parts online: