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I have a friend who used a free standing punching bag as a pell. And in the long term and the vynil eventually deteriorated and left the plastic top unprotected which lead to it being worn down and breaking. With this design even bare it should last much longer than plastic and will be much less prone to deformation and breakage from being struck. Though I wouldn't leave it bare of long as it would be ruff on your wooden or rattan practice swords.
It's not Ideal for boxing but it could be used with some modification. You would need to add alot weight to the base of it and add some extra padding to the striking Area.. Ultimately a Heavy punching bag would be better for boxing practice.
Great to hear, any pictures of the one you built?
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