No no alignment jigs are provided nor needed.

Just make sure the mounting pegs in the wings are all even with the wing surface and the decalage will be correct.

You'll note that the pegs or tabs, have threads, and widen out a bit.

The wider part should sit just above to covering or even with it.

Put these in first, then loosely mount the center carbane, but do not screw things down fully.

The carbane holes you must drill are marked on the inside of the fuse.

Lighly affix the top wing to the fuse after installing the lower wing.

Then put in the struts, but do not fully tighten the nuts.

Place the plane flat ( upright ) on a table ( of course the landing gear must not be on at this point ).

Use a T-square to make sure that the wing fronts and backs are square with each other. Shift of bend the center carbane as needed to achieve this.

You may want to support the wings with some external device to immobilize it. I used a few cinderblocks at least one on each wing side edge to keep things square.

Screw everything down and affix the center carbane firmly.

Your decalage will then be correct.