Recalibrating my Polar F6 HRM

After reading on of Becky's posts on how her HRM was acting funky and possibly not accurately recording her calories burned I decided I'd better check out mine.

My HRM is a huge motivator- I like to see the cals I burn during a workout, so better than OVER recording cals burned, let's make sure I've got it right.

Age, sex, weight, height- yup... quite sure I've got these right- LOL
VO2 Max- this is the one I wanted to be sure I had right.
I used the Rockport test for VO2Max which of course isn't as accurate as being plugged into a snorkel with electrodes and graphs but anyway:
Essentially: Walk 1 mile as fast as you can, take your HR immediately after and plug into the calculator here:

http://www.brianmac.co.uk/rockport.htm

Based on this test, My VO2Max is 34, which on the scale is "Good" for my age range. Will be interesting to see what my stats are for the rest of this week as I originally had this set to 36. Hmm...