Bought a new board in April and it is starting to delam (can't be warrantied because of cable riding)on the tail. Any suggestions for an epoxy to use and how long should I let it dry out before applying. The whole tail on the right side is complete mush at this point.

i'd put it in a warm place for a few days, and just use any kind of two part epoxy you can find in lowes / home depot. I used some on an old byerly I had, and it stayed closed for 3 years of pretty consistent use.

Last repair I did I just used fiberglass epoxy/resin. It worked very well. It was just a fiberglass repair kit for a boat. Let the board dry out very well first.