After seeing the pics of the busted scupper holes, I spent some time today making a new cradle cart. Ditched the old scupper cart. As I stated earlier I had a hard time with my first cradle cart slipping out as I was trying to load it. I searched some forums and youtube and found several great ideas. I modified one I found on youtube. It is made out of 1 1/4 inch pvc.
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My old cart did not break down, I would just strap it to the back of the boat. This will fit inside my kayak.
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The best part is that it does not slip out when loading it on to the kayak. Having the extenders on the front of the kayak made a big difference. If it wasn't for this forum, I probably would have busted scuppers at some point, so Thanks!