Not that deep into settings also but one thing I understand, TCR is something different then the value on the door, the value on the door is the calibrated value for the coil value on the tubo display, the one in the middle between Power and Temperature.
You have to understand that the temperature is a calculated value and not a measured value. When
@funkyjunky builds a tubo he measures the temperature so that when in Mode TCR 185 M1 together with the COIL value on your door your displayed temperature equals the real temperature as close as possible.
So when you now alter these settings, regardless of changing TCR value or COIL value, you get different temps then the ones displayed on the unit. Thats why you combust at 220 setting, it is now not even close to 220 real celsius because of the changed values.
When you have the feeling that the calibrated values are to low for your feeling, you should start slowly increasing the COIL value rather then any other parameters. So when you have 230 written on your door, try 235, if that doesn't feel enough go to 240 etc...
I have to say that I didn't changed any parameters and am quite happy with the accuracy of the device at it is calibrated by
@funkyjunky. Never felt the need to change things.
If you have a second vape you can test your accuracy easily by exchanging loads. Set your tubo to 180 and vape a load in cruise mode until there is no vapor left, stir, repeat until no vapor. Now put that herb in another vape, set it also to 180 and see if any vapor occurs. if yes, your tubo is really calibrated to low and you should try different coil settings. If you don't get any vapor increase to 185 and see if vapor is produced, if not your device is calibrated to hot and you should lower the coil setting if you want apropiate values.
Sure you can mess with the settings anyway, but then you don't vape your herb at 180 as your display suggest, you go much further then that without exactly knowing where your at. If you just want to chase the big clouds go ahead and figure a point close to cumbustion, but one wonderful aspect of vaping is the ability to get exactly what you ask for in specific temp ranges of your herb and using the tubo this way disables that level of control.
hope this makes any sense to you