I've built three of the Four Star 60's, and can tell you they're great planes. I"ll try and address your questions individually.

1. The wide end of the aileron goes next to the fuselage, so you've got it right.

2. doenst really apply now since you did it right.

3. The CA hinge can be used either way, but I usually put the narrow end into the wing and control surface so it goes in further and gets a bit better bite.

4. Actually, the Four Star wing is semi-symetrical, so it's a little bit (not much) flatter on the bottom. With the ARF version, there's only one correct way to join the wing, since the dihedral is already built in to the root rib and the joiner. Test fit the wing panels together, and if the wings droop down (anhedral) they are wrong. The wings should be slightly higher at the tips than the middle when they are joined (dihedral). You probably already know that, but thought I'd throw it in there, just in case.