You might want to add some disclaimers. It is possible that the cords are damaged so I wouldn't treat it like new until I had at least 1k miles on it which should allow a separation to show itself. Also it is probably a bad idea to leave the puncture causing item in the tire once you find it because it might locally overheat the tire carcass through more flexing. Having said that I have used string plugs many times on car tires and a few on bikes with no ill effects. On bikes though I feel much more comfortable with the internal patch because the air pressure inside the tire will tend to force it against the liner of the tire.
'Gonna get me a six pack...push people off the highway!'
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