I've updated the original design to allow you to extend the arm using a standard PVC pipe.
Uses two M4 screws to hold the pipe in place (or you can glue it)
For the ladder holder, I cut (2) 4" lengths of PVC pipe and drilled holes matching the M4 Screw locations so that the screw acts more of a lock than a tension mount. This works better because the ladder holder puts a lot more stress on the clamps than the skimmer.
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