Figured it out..Not sure what "read tweecer" does though...anyone?
I am guessing it reads an already programed position into the GUI so you can write it to another?
Its just for when you want to figure out what tune is burned to what position or confirm that your tune was written successfully. What you want to do is hit 'read EEC' then edit that.
you are right, read tweecer reads the calibration from the current position of the tweecer.
read eec reads the stock calibration from the eec.
if you are like me, you may not always remember exactly which calibration you have loaded in a certain slot on the tweecer. you can use the read tweecer to get it if you want to look at it or whatever.
i think most people start by reading the eec. then they save their edits to a new file each time so they can go back to a previous cal if the new one doesn't do what they wanted it to do.
to make it easy, i named my first file cal-999.ccf. every edit, i subtract one from the number. that way, the last cal i save displays at the top of the list when i want to open a calibration. i am now on cal-921.ccf.