We may call it building season, but I think the press calls it silly season. Or dare I suggest it - it may be assembly season. . .

Well, I can hardly justify buying an incidence meter when they cost about half the price of the disposable assembly project that I've been working on for way too long.

Here's a tip I used to check incidence alignment given the numerous cautionary tales I've read about.
One of the challenges is finding the center of the leading edge and this worked for me:
   Place a piece of masking tape on the leading edge at a point where it will mate with the fuselage.
   Put the wing on a flat surface and place just enough weight on the trailing edge to hold it down flat.
   Using a block of wood, mark your best guess center of the leading edge on both the block and the tape.
        Flip the wing over and transfer the mark from the block onto the tape.
   If you guessed the exact center of the leading edge, the marks will coincide.
        If not, the center line is the bisector between the parallel lines.

The marks on the tape can now be registered with the alignment marks on the fuselage.

The outcome in my case: the engine bearers, wing cutout and stab were aligned as well as I could measure,
but the dowel hole in the wing and former was off by about 3/16". Easily fixed.

I've used a similar trick to check the alignment of a stretched Twister that was hunting (former hangar Queen). I aligned the horizontal beam of a laser level with the L/E and T/E marks. I bolted a piece of flat maple onto the prop shaft and aligned the edge with the vertical beam to check for 0 or down thrust. I then checked the stab against the horizontal beam, adding spacer blocks to account for the offset. Bingo!

I always tell the guys at the club that there's no excuse for a misaligned ship.
There's will, there's a way.

Marcus