Perfect, thanks. I also had some trouble with Dense Plate recipes, added a bug http://bt.industrial-craft.net/view.php?id=1919 - should I have posted that one here first?
On the Blast Furnace GUI:
Could the Fluid Input and Output slots be labelled on hover?
Would a simpler way of showing the recipe be to show 6 Universal Fluid Cells (Air) in the Fluid Input slot? Or is that too specific?
What happened to putting chain mail armor in the smeltery to make steel? Still seems like a fair way to do it.