I was in the process of doing the Eddie mod and ran into a question. The diaphram had the 5mm "stopper" on the upward facing side and no stopper on the bottom. The stopper side of the diaphram is slightly textured with some writing (NOK and 055) on it. The downward side is smooth with no writing. From the pictures online this appears to be backwards....can anybody verify this or have any idea why it was installed this way?