I now have 6 tool heads.... all have the original die threadings and size.
(.45 ACP, .38 Special, .357 Super Magnum, 9MM, .38 Super/Comp, and soon .44 Magnum)
If you look at the tool head, the two issues you may have with "normal" dies are as follows....
1) the Decapping and Full Length sizing station is right in front of the cross pin gusset.
Thus a large die may not fit in there. Some of my tool heads (later) have a recess machined
in them for die entry and removal... Some do not.
2) You will still need appropriate BELLING die made for station #2 unless you totally skip that station.
I think we should all try to preserve our Stars for future reloaders and thus my inclination is to
keep it as original as possible.