A 8' cat is not a stable platform to stand and fish off ,sounds like a balance problem,move the frame forward on the tubes( if you can) this will make it track better,does your anchor hang centered off the rear... this is critical.These are just some of the reasons why I fish a 12' cat even though it's bigger it draws less water,so it's way more manuverable,even with twice the weight on it...Good luck

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Tight Lines
FISH ON ------<*)>><
Men are like fish we get into trouble when we open our mouths to much!!