I have a 2006 Grady Gulfstream. The front and back piece of the helm seat back support screw together. There are posts on the seat back that the screws go into. 2 of the posts have broken off and some of the post has eroded. I plan to glue the post back as best as I can but also was going to glue the contacting rim around the broken post. Any suggestions on a type of adhesive to use? Thanks