<< There is a very simple solution for that, just save off a version of your model before you put the fillets on. If you decide you don't like one of the previous fillet steps then just load in your previous model and do new fillets on it. It isn't necessary to rebuild everything then.

Yep but not so practical than the variable fillets when you have tones of "segments" so means save a version of each segments fillets project yet defined if you want change this and not this one... ;)