I'd like to tidy it up sometime, maybe over Xmas...
It doesn't have all the crucibles or materials or conversions entered into it, though they should be addable if you want one it doesn't have.
On that note, don't assume it will warn you of all possible conversions that you might do accidentally, since it doesn't know them all. Check yourself.
There seems to be a problem shown in a 'Magnetite->Steel' page, it shows that even with 5000000 coal in an Invar burning box a ceramic crucible will not melt.