Fuselage: Baggage area. Seat back hinges.

There are a set of six seat back hinges composed from AN257-P3 hinge.  The plans call for each of the six to be 10.5 inches long.  Much like for the elevator trim tab hinge, a locating hole is started on one end 1/4" from that end.

Following match drilling the 6 hinge pieces to the F-01447-L/R baggage floors, it turns out that the final hole violated the edge distance requirement (not sure if it applies to LP4-3 rivets, but seems it would).  I determined that this occurred because I didn't factor in the kerf of my band saw blade, so the hinge ended up shorter than 10.5".

You'll notice in the picture below that I used the wrong hinge on my first attempt.  The bottom hinge is piano, whilst the top is my replacement AN257-P3 (primed).  I didn't realize this mistake until my replacement AN257-P3 arrived.  I thought Van's sent the wrong one, until I saw it was marked properly.  So, I'll have to order replacement piano hinge now.  It's inexpensive, but because it's 6', shipping is high.  I might wait to consolidate that into the finishing kit.

When I went to match drill the replacement hinge, rather than risk hollowing out the holes in my baggage floors with more match drilling, I matched drilled the AN257-P3 to the piano hinge.

As an aside, here is a nice tutorial on structural vs. non-structural breakstem rivets.  At this point, I'm not certain which family LP rivets are, but it seems to be one of those listed at the bottom of that tutorial page.