The masts for the 26
X and Ds are the same length (28 ft.). However, the X is a 7/8 rig and the D is a 3/4. That means the hounds are higher on the X and probably the speaders are at a different location. The X displaces a good bit more than the D, has 300 lbs. more ballast and carries more sail...the upshot being the mast extrusion for the X might be a little heavier than the D (the Ds is 38 lbs.). I am sure if you contact the factory, they can tell you.