The black hooks allow the length of the shock cord to be adjusted as the height of the stack of strips increases.
A small diameter pvc pipe runs along the length of the frame for the hooks to catch.
A 4 inch wide platform, below the hooks, also runs the length of the frame. Strips ready for install are stored there.
Outriggers, adjacent to the platform hold the next strip upside down so that glue can be applied in the groove with the glue gun.
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