Quote:
Originally Posted by kwakatak
It's a kind of extendable turnbuckle that is used to exert force against the neck and heel blocks while the glue sets. It's not a permanent part of the build.
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Kwak,
Is partially correct. It is a turnbuckle and can be used for as a clamp to hold the end and neck blocks in place while the glue dries. However, I don't use the turnbuckle for this purpose. I use it to apply pressure to the rim to hold it snugly inside the form while I sand the kerfed lining gluing surfaces.