If the Ram normally has the shell carrier (which align with the turret) would it align with a single hole without it?
EDIT:
Have been going between part lists for pro 1000, and the 3 ring turret.
Part numbers for base (tp2125) , and top ring (tp2126) are the same.
It would seem a ram replacement (TP2107), and confirmation of column height (possible column replacement) would allow for use as a manual indexing 3 hole turret.
My 3 hole turret press columns are 4 1/4 inches long(not including threads!) measured bewteen the base, and top plate.