I'll echo - buy the conversion kit from dillon for ~$80.
Lee progressives can be converted as well... although kinda moot given they're inexpensive anyway... well, moot as far as changing primer sizes etc. The die plate just comes right off afaik.... so small <> small is just a die conversion along with autodisk changes.... nothing terribly interesting.
As far as SFG's suggestion at a class in April, I'm game