Works alright - I've only smelted steel in edgeville so far.
Biggest problem is that it at some point it decides it's out of ingredients for steel when it's not. This seems to be circumvented by adding the smelting steel task a bunch of times and it will eventually detect that it has the ingredients for the task.
I'll send the logs to the dev to see if they can fix. Shouldn't be paid until this is fixed, as it can error out within five minutes and still charge you.