I have one in the works now, but the last one I did, I used HHG for the back joint - no problems. It's 3 years old now. The only break I had was along a grain line, which I fixed with Epoxy. without issue. It did not break along the glue line. Always work with a fresh joint with Cocobolo. Acetone just dilutes the oils and brings more to the surface, faster. I'm trying to remember, but I believe I sanded the joint with 120 grit on a level before gluing. The glue up should be done within 10 to 15 minutes of the fresh joint. Read a thread over on OLF earlier today, one of the experienced builders said he's used HHG, Fish, Titebond, LMI White, Probond, and Epoxy all without issue.
Here's mine - was my #5
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