as posted by me previously i have been playing with making wider tail ends for my slalom and speed booms. They all worked ok for a short period but all eventually failed.
25 from the SRM GTC team came up with a very simple solution.
Basla wood shaped and glued inbetween the the tail end tubes and then wrapped in muti directional carbon 50mm wide tape. He used his in Shark Bay recently with no problems.
Here are some pics of two i have just finished. They are curing today and i will tidy then up tonight.