My heart rate was acting up on caffeinated coffee and decaf, regardless of brand. It still acts up even with all the 'good' stuff gone from my life, just not as violently

In a word, no.* Nor wine, whisky/ey, chocolate, or licorice. I upped my fish consumption to compensate for the Omega 3 in capsules. * I'm not sure there is one. It took three months at a pound a week to find a decaf that ticked all the espresso boxes. And I still had a racing heart waking me up

Yes. As we know coffee has umpteen chemical compounds. I was still having symptoms with decaf, so until I got a handle on all possible precursors, I opted to forgo all. "Wikipedia: List of chemical compounds in coffee"

Admittedly, I didn't try every decaf out there. Howell, Counter Culture and more eastern roasters were next on the list, but I just gave up all the arrhythmia precursors. The Fresh Roasted was the only one that ticked all the boxes for the 18g in -> ≈35g out: crema persistence, mouthfeel, taste, etc...

Old school hardware stores often have bins of all kinds of such items. You may have to replace all four if you can't find an exact replica. ebay has 10^3s of rubber feet

Over the course of about three weeks, alter a blend of hi-test and decaf so you are 100% decaf at the end. It's about 5% change per day. 95/5, 90/10, 85/15, etc. FWIW, the only drinkable decaf [for the coffee style I prefer - old school medium roast] I found of too many direct to bin was "Organic Pe...

Like my Mom, I could drink coffee anytime and sleep the sleep of the dead. Now I, like my missus and many of our Pfizer vax'd friends, have developed heart arrhythmia. I cut out coffee, chocolate, alcohol, licorice and Omega 3 oil in capsules. And yes, life is still worth living. At a month shy of my

Old age. Chips suffer everything from infant mortality to senility

It could be a failing memory location. What happens if you set to 127 or 129?

You could try writing down all the settings, reset the PID to default and then re-enter your settings. Manual here: "BA_ECM_Controvento_02.2014"