I'd also like to point out that this guy has been using always the same method (double parenting), even the same he used in a plugin he released here some time ago that got trashed (I still have the decompiled source of that I think).
Anyway, he should probably have credited Mecha The Slag for it:
http://pastebin.com/629Z21sF
This is only really good for attachables that aren't hats/weapons since they can't be inspected so if I was Valve I wouldn't really bother fixing it.
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