ORIGINAL: Hogrider
I have built two Eagle 2's and assembled one Eagle 2 ARF and have not encountered any problems with Stab alignment (unless I caused it myself).
I am sure that the misalignment that I had was something that I caused. It surely could have been avoid with a little more care.
Any mods that I did on my Eagle came after flying for a couple of seasons, and finding things that I wanted to do differently or was having problems with. The main changes that I made were bolt on wings and built-up wingtips to replace the plastic ones.