Thanks to those who made suggestions on correcting my airspeed indication.
I adjusted the pitot tube from 3 1/8 to 3 7/8. Flew yesterday evening - indicator read 105 - GPS ground speed was 101.5 and I had a slight headwind. I was staying ahead of school buses, but they were stopping to let off passengers. Haven't done the NSEW thing yet, but will do that later in the week. Rick 611GC
