Hello,
I found a red-top 828 Rapid with a preheater torch of "Löffelrapid" type (is there an English name for that?). The lantern seems otherwise to be a promising restauration project, but it's letting the pressure out from the preheater torch: more accurately the nozzle can't be blocked well enough to keep the pressure in. Do you have any tips I should try? I haven't disassembled it yet, as it seems to be well stuck and I'm worried if using force could broke something. Are the current preheater spares suitable for this "löffelrapid" variation?