Problem with track system and downrigger

[dh99]

I have a track system installed on my Lund fisherman its a 2004 and I have 1 scotty electric and 1 cannon manual. the side the scotty is on flexes like crazy and is starting the bend the aluminum when I let out or bring in the ball and its only an 8lbs ball


The track is 24 inches long and had a wood backing underneath the aluminium already and I added another piece of 1 x 5 underneather and bolted the track to both. I am worried that it is going to get worse. I couldn't get a piece of of wood the total width of the gunnel because it gets narrower as I go towards the front of the boat and there are wires hanging from there also.

Anybody have any ideas how to make this more sturdy? How do most people rig the tracks for downriggers? what kind of back plate do you use or do I need to add a better support?

thanks

DH99