Weight distribution in aero position

Dan wrote an article for one of the tri magazines a year or 2 ago, wherein he discussed safe weight distribution when in an aero position. It was something like no less than 45% on the back wheel, measured with bike on a trainer and front wheel on a bathroom scale. Can Dan (or anyone else) remind me what the correct distribution was?

Thanks,

Ken Stoltzfus

47% front, 53% rear is what I feel is appropriate.