You don't need a weatherman to know which way the wind blows~Bob Dylan
Or I could just be totally goofy.
If you're using Amsteel or other cord from your hammock then I think the T-shaped PVC is a very neat solution. If you're using a 'biner like Gumbo & I use (because we don't care about weight ) then a straight toggle is just fine.
I think there's quite a bit of merit here -just approach with caution especially if using smaller diameter cordage.
I like the T shaped tubing idea (be it metal, wood, PVC, etc.) as it would give some symmetry to the setup and would also eliminate the tight radius turn of the continuous loop resting on the suspension line as in the original dowel method.
The continuous loop would now be resting on the gentle curve of the T shaped toggle.
I would be a bit nervous though about the continuous loop sliding off though as others have mentioned.
Let's now look at my suspension: I run dogbones off the ends of my hammock. If I take the open end of my dogbone and loop it over the toggle, I suspect the load would probably be more on the Amsteel than on the toggle...this is just one of those things I'm gonna test.
Am I talking crazy, or does this stand to reason?