Paddle connector for Intex Explorer 200 inflatable boat

I purchased several Intex explorer 200 inflatable boats to use as pool cover pillows and had several left over paddles.  I designed and printed this connector piece so that I could utilize the left over paddles as a full kayak paddle.  The tolerancing is tight enough around the spline profile that it makes a popping sound when you try to separate.   There is also a positive stop to make sure its centered between the 2 pieces. Its tight enough for me that I didn't need to glue and they did not come apart after a couple hours.  I printed PLA with a high fill rate (75 to 80%) to make sure it won't break.   It seemed to do fine in summer weather but I suggest ABS if long exposure to sun is expected.   I also printed with a raft to be sure to get good adhesion.    When complete the paddles is almost 8 ft (~2.4m).  The paddle can be unscrewed at factory connection points and pulled apart from the 3D printed connector and be packed into an 18" (~0.5m) length.