for discusison:
Based on quick mention by Saami is he expected the helms to take longer to make. Currently it is set at 8 hours as in a game with eating and drinking that's about the max any one step can do.
I've been thinking about how to add time especially to the spectacle helm.
there is already iron shape which could simulate making the eyes and nose guard
There is menu space in smithing where you make the steel dome. So Im thinking of adding an "armor plate" or such. This would be different from lamellar which is lots of small plates. The armor plate would add time based on flattening the steel billet and drilling some holes for rivets.
Then the basic helmet would call on a few armor plates and nails (as rivets).
Spectacle helmet would then call on the basic helmet, more plates, nails and "iron shapes".
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In real life I have made some "crude" metal armor for medieval re-enacting that I fought in. Also made a steel dome (like in BAC) for a shield boss. Starting with a circular plate the dome was pounded out in an afternoon as that's all the time I had with the guy who had the stump and clamps. Drilling holes came later (with modern electric drill thank you very much).
The BAC uses the steel dome as stair stepping to the top of the helms, elbow guards and knee guards.
My own fighting helm was made by someone else as I wanted a skilled craftsman to trust my brain too. Did need to be around the workshop for measuring and for working on my knees and elbow cups at the time.
So though I didn't make a helm I've seen some building styles like the spaganhelm. Basic is that you have a wide sheet of steel that makes a cylinder for the base, the upper half gets upright U shapes cut out, the remaining columns are bent inward to join on the dome top. Those columns are single axis bends so not very hard.
To fill in the gaps you need other tear drop plates (slightly larger than what you just cut out) that are shaped to a shallow bowl. Their sides overlap with the columns to which rivets join them. Collectively the tear drops (4 - 6) collectively make the shape of helmet.
I may look for links letter to show.
A cross bar than tear drop method at:
https://www.instructables.com/Basic-Spangenhelm-Viking-Helmet/>>>
Any way opinions welcome.