Gavin,
I agree that this issue of resins was well understood hundreds of years ago.
Something that will expand and contract and take up shock was required, and they appear to have found the perfect solution.
The Tulwar is another example, with a short tang gummed in place with the resin of the Pepol tree. It Looks like it should not work, but Does work, and very well.
The older kukris often had the blade so attacked to the hilt as well, but not sure if the resin was the same composition.
You are quite right; the way of fixing did not change because it worked!
All very interesting!
Richard.
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