Welcome to the Forum. IronDesigns offers a full size rib drawing and many other detail drawings but they are not plans. I used the IronDesigns wing rib drawing and his nose rib, aileron end rib, and wing rib gusset patterns, but I am building my XL to the official Milholland plans design. You asked if the LE & XL wings are just different in length. The wings are different length, but the wing mounting system is different, too. You can use the same wing rib pattern for either plane, but you should follow the Milholland plans for other features.