Good read. I have been following Brian Litz's velocity tests for many years. Basically, your standard chrony's are the least accurate; with most of the cheap chronys being highly inaccurate. Litz found the Magneto Speed to be very accurate, and a properly set up Labradar even more so. My Oehler hasn't come off the shelf in years, and I always take my Labradar to the range nowadays.