Boat my boat because the deck core was in great shape even though it was a 1976. However, this year I found out the core under the mast step was rotten as observed as the step started to sink a few weeks after stepping. In order to keep the boat in the water, I drilled holes in the step on the mooring and injected Git-Rot and sealed with silicon sealer. Seemed to stop the recession quite well. My question is: What's next? Do I cut out the mast step this winter and replace rotten wood , or should I drill more holes and use more Git-Rot or just leave it alone? Any help appreciated, thanks.