I have a quick question. I've been having an issue where the ball occasionally gets stuck on the hole for the control room up-post or for the raptor pit up-post. When I look at them, the up-post is about 1/2 a cm below the surface of the playfield, which essentially creates the hole for the ball to sometimes rest on. Is there an adjustment I can make to change this? Is there supposed to be space from the playfield down to the up-post or is it supposed to be flush?