Ah, that makes a lot of sense. Thanks for that image. Until now I had assumed it was a coil that hurled a solid metal core (which always had me wondering where

Ah, that makes a lot of sense. Thanks for that image. Until now I had assumed it was a coil that hurled a solid metal core (which always had me wondering where the rail part of the name came from). No idea how I failed to catch that for years.