I bought this controller to replace one I broke. Link below! http://www.ebay.com/itm/K-B-Electro...t=BI_Control_Systems_PLCs&hash=item2a0e122c38 You see the little blue control box? The one that has the plastic on it. Well the one I had that broke didnt have that on there. It had wires where it screwed into the green box. My question is.. Can I remove that light blue little box and use the one with wires that connect to the green box to control the speed? Thanks!