I am alittle confused about how Completionist works ... what happens if you TR a few times after being a Completionist ?

Do you always have the Completionist feat at LV 3 to take after every TR?

Doi you need to "run" threw all the lives if you TR to "reset the Completionist feat"

So... you finish your last life and TR into your "final" build... do you have to be sure of the final build or can you just TR again into something else and not lose the Completionist feat?

TIA for you help!