Well I have had those for several years now. It took me almost 20 years to perfect them but mine will also add fuel and adjust the air flow if need be and will even alert me if something is out of its control, at least when I have programed it correctly, dang things have a mind of there own sometimes. It took me forever to figure out how to configure but once I got the hang of it it was fairly easy with just a few glitches from time to time, its an ongoing project but I enjoy it. This has proven very costly but very effective its called a wife and kids, LOL.
MY DEFINITION OF AN OPINION.
I can only give credence in facts I believe factual. If those facts are wrong, and are proven as such by facts, I must only give those facts credence, if I believe them as factual.
When the going gets tough, I take more fiber.