You can turn one servo around and have the linkage work correctly. Tailstrike is mistaken. Many planes have the ELEV servos at different distances from the tail. I have a QQ Yak. The servo openings are offset from the factory. There is not enough room in the fuse to have the servos directly across from each other. The bottom of the cases would hit. As long as the arms are positioned the same on the servos and the geometry is correct. The halves will move the same. The reversing Y would save you from changing the linkage but either would work.

David