I got a new scale today because I knew my old analogue with the tiny dial wouldn't cut it. Fortuitously I also bought a bag of dog food allowing me to check the accuracy of the new scale. Turns out my old scale read 2 pounds lighter than it should have.
Not a fun discovery, but now that I know I am 2 pounds heavier than I thought I am more ready than ever to get on with the challenge! Bring it on!