Heh, good one.
"Sorry Smedley old boy, but your space station concept is as obsolete as that hideous cow creamer at your elbow. Just not enough tangential velocity to provide acceptable g at the rim of your ring world given the size of the thing. Now if...."
"You silly git! Step away from the pint and stop blowing smoke rings from your arse bigger than the rings of Saturn...see, this is wot 'appens..."
maybe someone who has the original thread ping list could alert others.
Get it now, because there is a ten year old armed with such information and prepared to use it and leave you slackjawed and gobsmacked for lack of an answer.