And just to be clear the Mountain High electronic box - aka the metering device is designed to be used with their special low pressure regulator. I like this system very much. And another plug for Mohntain High is you can return the hardeare to them for free testing. Nit a bad idea to do every year or so. And any changes will get updated (they may charge for updates/fixes)..

If there is any doubt a new steel tank is not expensive. You really do not want to be near tank failure.
Darryl