I havne't done any heavy sparring, just hit a tree with a Heavy Grade blade. I don't suggest that with thin walled, but thick walled survive just fine.
Tom
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I can see it splitting or cracking with heavy hits. I was a bit rough with toys as a kid and have memories of testing the durability of most of them!
Also I think im gonna do a build log of my first saber. Kind of commerating it.
Should have my first set of parts tomorrow woohoo.
Dave