<p>Hi, I don't mean to spam your post, but I had two questions about the small extruder you posted a while back. 1. Will it work with RepRap wallace. 2. In the bill of material it states I need a M3 worm Drive. I am not exactly sure what I need, could you possibly link a picture of what it is I need? Thank you very much for you time, and once again I apologize for posting in different models.&nbsp;</p>