what Bug you talking about, that I am apparently not supposed to know of?
A bug in my spreadsheet, not your crucible!
Though on the point of bugs, I still maintain there is a problem with the magnetite->iron crucible recipe in .62, it doesn't match the electrolyzer recipe and changed since previous versions. 21 tiny piles instead of 7 regular is quite a difference.
I'm not going to take any responsibility for people blowing things up after using it...
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.
Usage notes (you should be able to edit it):
What I've been doing is copying the Crucible Base sheet for each set I wanted to do, just to save the settings.
Adding new conversions or materials etc is done in the Data Store sheet.