Small hole, big pipe. Make a drill from the same size pipe that will be installed. I use an angle grinder to make a bevel on the outside of it. The hole will be the inside diameter of the pipe, which makes for a Really Tight fit. So tight that it made a bulge in the bottom of the saddle after forcing it in, which was easily flattened with the surform. Also, the pipe is shorter than the saddle is wide (8" wide saddle, 7.5" pipe), so its recessed in the foam just a bit.Pea Pod wrote:Great post! Lots of detail & clear photos.
Question: how is the transfer tube secured? Because it doubles as the anchor for your thigh straps, I'm wondering how you have secured it to the foam?
I don't use any glue or cement (don't think it needs any) so that it can be removed to work on the straps when necessary. I have an identical setup in my Spanish Fly. I put one thigh strap on as tight as I want it, then the other. No problems with anything shifting around.
Here's my 3" drill. I drill half way from each side. Stop at least every inch and check your angle.
The 8" plug removed from the saddle. You can see that the plug is the inside diameter of the pipe.
My only concern with this setup is this...
I have wondered if over time the upward pulling force of the straps will cause the saddle to become concave on the bottom, pulling the hull up with it. Which of course could be easily fixed with an additional layer of foam and a heat gun. This is why I use 3" pipe, to distribute the force over a larger area.