PVC fort maker kit variation

I attempted to use the previous fort-maker kit, and the first thing I did was immediately snap the piece off where the layers meet. Then I found that the pieces are a little inconsistent where one leg is too tight for a child to get it into the PVC, and the other two legs were too loose. Then the straight flat ends made it difficult to shove into a pvc.

So I started from scratch. All the legs of the connector should come out the same size. I used a cone shape so it is narrow on the end and expands so that you can snug it into a PVC and it can accommodate variations in the size of the pipe. I also rounded the edges so there is more surface-area grabbing the inside of the pipe, and rounded the tip so it is easier to get into a pipe. I rounded the center piece just for aesthetics.

Initially I had the outside set to 14mm and the peg grew to 16mm near the center of the connector. It turns out that much slope makes the peg want to jump back out of the pipe. I re-created the mo