Unfortunately, Union Carbide is no more. What is left of them is now a subsidiary of The Dow Chemical Company. I don't think they are in the arc carbon business. (short of blast furnaces.) Here's the thing- There are many different types of carbons. The DC Suprex carbon used for the Super Trouper were hollowed out and filled with a softer center. This is why it formed a rim crater, which is what was focused on for the stage projection.
You want to use carbons that were designed for cinema projection. The links in my first post were for that type. Welding carbons won't work too well in the projection application.
"Good reason instead to upgrade to a more modern followspot. Highly recommend Lycian over Strong or Rober J. by way of bench focus concepts amongst other things for a good xenon or other lamped fixture. "
Not sure why you would choose Lycian over RJ for bench focusing, the RJ followspots do not require any lamp optimization at all (except maybe one or two of the older models...). But I guess it is personal preference.
Nope, newer.... they are not Supper Troupers but smaller ( and perhaps older) ...
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