answer:An intriguing problem! Hmmm…I’ve not worked with kite string, but I’d be concerned about either tangling, or twisting stress on the line if you unraveled it that far in an open space and then wound it back up. The trouble is you can’t count revolutions, because as the spool dwindles, each revolution is a different distance. The arduous route would be to set up the target spool across the table from the source spool and mark off (count, really) feet or yards as you slowly wound it from one to the other. I’m curious to hear…there must be a very clever solution to this…