I've got a Genesis Equilibrium 725 steel frame and fork that came with an unbranded (but said to be Prestine) headset and Genesis-branded top cap and star fangled nut.
The headset and nut aren't fitted, and I'm considering buying a Cane Creek headset to use instead of the unbranded one, but my question here is specifically about the star fangled nut:
Can I use an expanding plug instead of the star fangled nut?
I am aware that an expanding plug must be used instead of the star fangled nut in a carbon steerer (e.g. see the entry for "Star Fangled Nut" in Sheldon Brown's glossary) and I have heard that expanding bolts can be used in aluminium steerers, but what about a steel steerer?
And should I be looking for a particular type of expansion plug?