Hi all, just wrapped up my Eros 2 build last night (past all resistance and voltage checks, super stoked!). Man, what a fun kit to build! Anyhow, had a quick question about the tubes. What are the metal cylindrical covers for the EF86 and 6922 tubes? I have a few tube amps from Schiit and a Bottlehead Crack, but have never seen these used on other tube amps. Just curious, thanks!
