Some of us like the fiddle factor and make our own stuff. But not everyone has the time, confidence or desire to do it. Whoopie slings aren't hard to make but they do take a little time, plus liability insurance and other overhead costs.
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I have these links for my home setup where I am not having to take down on a regular basis. I did use them at first with my travel set but they did take longer for setup and take down. I did like the price though.
another vote for the nano 23 'biners -- I picked up a 6-pack and they're very handy for a lot of things.