The reason I need to remove the cap is due to finding termites under the floor when I was tearing out the floor to replace it. I need to replace most of the stringers as well. I thought removing the cap would make this process easier. I have removed all the floor as well as foam between stingers. I have drilled out all rivets to separate the cap from hull. However, I still cannot get the cap to separate. I would appreciate any help for procedures or explanation of process to remove cap.