I don't crimp with seaters, anyway.
I have a factory crimp die if I want a crimp. Sometimes if I have light seating with mild bullet/neck tension, I may add some crimp. Good thing about the Collet die, you can cut some off the mandrel to increase bullet/neck tension.
Chuck the mandrel in a drill and cut it down with sandpaper, measuring pretty often, so you don't have to buy another one and start over...
Never had to do that...
DF
