Have Sweetwater 1770 with Yamaha 40 hp outboard. Noticed this summer the rear cross rail has developed cracks where the motor pod is bolted to it. Cross rail is 1 x 2 x 1/8" C-channel. Bolts from pod only go thru bottom flange of rail. I have added 2 stainless bolts up thru the bottom and top flanges, floor and carpet as a temporary fix. This just doesn't seem right for a boat that's only been on the water for 3 1/2 summers. Any suggestions for a permanent fix? Thanks.