Hi @ColinUK - you carry on doing what you're, im very impressed with your achievements in such a short time frame, and i know you will keep it up, you seems very informed and tenacious. Good for you. I have today just returned from the nurse about my blood pressure, as it was on the high last week (It does this occasionally) on my annual asthma review check and she gave me a BP monitor to use twice a day at home for a week. I told her i already have one and monitor myself regularly and knew it was a little up. She looked down her nose (which was easy because they sat me on a very low chair!!) and abruptly said "Well its not calibrated" I replied whenever i get my BP checked officially i come home use my machine and its pretty much the same reading so its good enough for me to monitor myself with it. I told her i was pretty sure this spike in my BP reading was just down to a little too much coffee lately ( i get these spike in Blood pressure if i indulge in too much salt or coffee, so its no news to me) .....She ignored me. Anyhow just got the results back this morning, and as i thought, my BP is absolutely normal for the last 6 1/2 day - since i weakened down my coffee and quit using a giant mug for it LOL....... So much for her calibrated machine! 😛