The location of the CG as a proportion of the wing chord does not depend on just the wing, it also depends on the length of the tail arm and the area of the stab. It is proportional to...
stab area/wing area X tail arm/wing chord
So if the tail arm and stab area are reduced compared to the LT-40, the CG position as a proportion of the wing chord will be smaller, i.e., farther forward.