smelting, petrochem and others is made to be independent of bobs, so what you suggest is basically to rewrite all recipes to utilize bobs.
While this might be interesting, basically it will need from angel to make 2 sets of recipes, one, when bobs is detected, and one without bobs ... that's a lot of work, if you ask me
![Rolling Eyes :roll:](./images/smilies/icon_rolleyes.gif)