----- // -----if you dig deeper in this site you will find a diagram of an Oday 23 rudder with all dimensions. look in the BOAT INFO/23/MODIFICATIONS
remember... the 23..25...26 are almost the same, and a lot of the ifo is revelant to each length. I understand that the older rudders were straight on the lead edge from top to bottom and the newer ones went under the transmon somewhat. You will see this in the picture.