Pallet truss prototyping exercise.

I have access to a waste stream of pallets.
They are 48" x72" , but in principle these same method should work with the 48 x 40 pallets as well.
In this exercise I am trying to create a snow/rain shedding roof truss.
Using existing connections is good, but not the only priority.
I removed all but two of the deck boards because of the shade they would cast.
If I was building trusses for a shed, I might have left the deck boards in place.
I used screws for this prototype but I would use a nail or staple gun for "production".
The 6 foot boards are overlapped and sistered together to be 7 feet long.
This feels kind of wasteful and inelegant, so I'm thinking of  trying pieces of 2x4 as blocking at where the 6' board meets the 1' stub, to avoid the doubling up.
Here's the photos:

Its a great idea, I have built cottages with that method.
A warren truss works well for larger spans.

Why not aim BIG!!
http://naturalhomes.org/timeline/pallet-pavilion.htm

The parallel chord truss described here is similar to the one designed by Alfred von Bachmayr, who developed a truss made entirely of salvaged wood pallets. The main difference is the use of small diameter poles for the top and bottom chords in place of pallet material. For von Bachmayr’s article, see The Last Straw Journal, issue #38, The Pallet Truss: A Low Cost Alternative Roof Structure.