Darryl Keil
Posts: 1445
Joined: 2003-05-22
Location: Maine
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Every time you add a glue line you gain more stability so adding a cross banding layer in the middle will enhance this. Also, its industry standard to have a odd number of laminations in a lay up. You have two or more glue lines pulling against its opposite with odd number laminations. Is it an absolute must? No, but it can add a extra stability. If you’ve done it before with good results with just two sheets then I wouldn’t worry about it.
Grain going in the same direction in the center of your panel is not such a big deal.
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