Is there a link to the site where they are sold?
About the floppiness and propulsion: I have a spellbound, and it has a rather floppy tail. I thought the propulsion would be poor. But it's not! Its better than a Mahina, better than a FinFun, even better than my modified FinFun (stiffer, angled). So, don't judge until you have tried it.
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