John and Khoung just swapped 7m and 8m sonics.  Now 8m speeds are higher.  7m speeds are perhaps a bit low.  Now S/N720 is at 8m and 369 is at 7m.  (I just interrupted the data stream to determine this.)

I guess this means that 720 has been reading high all this time (and still is)?

6-4-09 (twh) swap occurred from 14:45 - 15:25