Here's mine with the pickguard just placed on it. I still need to make my own 3-ply version (will attempt that tomorrow), so I can reshape it if necessary.

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Here's a '66 SG Jr

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They aren't that different. It's more that on the '66, the bevels are wider (even though I've increased mine a bit) and the guard follows the inner curve of bevel on that bottom edge for most of the length.

So I'll probably/hopefully do a modified version that follows my bevel better and fits the horn a bit better as well.