Can you please explain what you mean by:
“I could delete all the EAs, and put the new EAs in their place, but that would not work, if I have changed the levels of TP and SL /or I would need to change them again/.”
If I was to change the TPs and SLs in the old EAs, and then if I was to put the new EAs, my corrections of TPs and SLs would have been lost on the change.
I hope it is clearer now.