[modeleng] Two Questions

Question #1 - How were the brass domes on vintage full-size UK locomotives
made and what was the material thickness?  Were they cast & machined,
beaten, spun, rolled & formed, other, all of the above?

Question #2 - How prevalent has Monel become (in your area) for
piston/valve rod material over SS these days?  It began to be mentioned in
ME as a preferred alternative a few years ago but I've seen very little
said about it lately.

Regards,
Harry

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