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I'm building this right now! Quick question. On step 3 it says that the back supports will extend 1 - 1/2" on either side, but arn't they going to extend 2 - 1/4" since we cut them to 40.5"? Is that too long? Also I think those 1 - 1/2" Screws arnt going to be long enough to fasten the 2 x 6 to the plywood. Heading to the hardware store to get 2" deck screws. Let me know if I am misunderstanding something.
Homemade Boomerangs on a Student's Budget
You were right. The Finish Birch does work very well for this project. Not only do the additional plys make for a stronger/better looking 'rang, I've also found after the first few throws that the increased density of this plywood improves the flight characteristics of the boomerang.