I currently have an 8 foot boat rod with a 13&1/2 inch butt grip. Can I extend this butt section about 4 inches and if so, how do I do it? I'll only be using the extended butt section to hold under my arm while fighting fish. The extra butt length will help get the reel further out from my body and make it more comfortable to wind in line. How do I extend the butt grip, if it can be done?