OF
Well-Known Member
Thanks OF, that was about as thorough of an answer as I could have asked for.....
By the way, are there any pictures of these cores anywhere that show the internals?
You're welcome.
Sorry I know of none. As a guess by way of discouraging (or rather not encouraging) poking around inside? They can be very easily wrecked just dealing with the four screws holding it together. Once that happens it's rebuild time as the base piece will need replacing.
At one point furnace cement was considered to retain/lock the screws but you know how guys are about 'mystery, toxic materials'....... They stuck with 'metal, ceramic or silicone (rings)' materials.
OF