I am currently in progress of making little overhaul to Infitech 2 and I am looking bit deeply into IHL now. But I am finding hard to find out some recipes.
For example recipe to make Steel hammer head is not showing anything. Well it does show furnace recipes: Tar pitch bar => Small piece of tar pitch; Bucket of spruce resin => Bucket of tar pitch... both of these when I try to look up the recipe for that Hammer head.
Another is Tiny stell bar. Again it shows only furnace recipes for the tar pitch.
And a lot of others. When looking at the id names its most of the items ihl:item.ihlSimpleItem doesnt show any recipes, or only "Tar" in furnace recipes.
edit: Oh and also forgot to add, that even when it shows correct/working recipe for the item, it is still showing the Tar furnace recipes as well...