Unless I am missing something...

Why would you ever need another one of those breech-lock die collets? I mean, the press comes with them and dies screw in to them. Dies screw in and out for the last hundred years before the breech-lock collars were invented... could you not simply screw in the 3 or 4 dies you wish to use and never buy another collar?

When Lee debuted the Breech-Lock concept a handful of years ago, that was my thought exactly.

Surely we can screw dies in and out, yes?