"Are there any others who have done the same & how do you finish off the join line."
Hello Robin, My rear turtle deck extends from the aft edge of my canopy to just in front of my vertical stabilizer. From this point aft is another removable fairing that is held in place with five 10-32 screws. Once this aft fairing is removed it allows access to the piano hinges that hold the rear of my aft turtle deck to my top longeron very similar to Mark Langford's but only about 8" long on each side. The front of my turtle deck is held down by a bolt/post that extends horizontally from my doubled top longeron about 1" on each side. An "L" shaped Aluminum bracket is floxed into the bottom of my front turtle deck that engages the post. To remove the turtle deck, I remove the back fairing, pull the piano hinges, lift the aft deck out of the hinges and slide rearward about 1/2" and lift it off. My seam to the top of the fuselage is like others. I put a single piece of duct tape to the top and outside of the fuselage, put the foam deck on the fuselage, and glassed it in place extending the glass down on to the fuselage duct tape. Once cured I popped the deck off and glassed the inside. After that I trimmed it to about a 1/4" overhang. I don't intend to do anything else to try and hide this seam as it runs horizontally and shouldn't affect the performance. Stephen Teate Paradise, Texas
