So I felt the right a/c adjuster knob lately feeling loose. Well it finally fell off. I was off to a buddy's place and in a rush I tried to pop it on one handed leaning to the side. I broke the dang thing. I contacted Ed about the part here is what he said "your going to need the whole assembly. the knob is built into the assermbly. odd design, but you will see when you remove it." He said $50 shipped for the whole assembly. I didn't think I need the whole assebmly. Because I once disassembled the left knob and the whole unit when the blower motor resistor was shot (before I knew that the bmr controlled the speeds). The knob just comes right off. Any suggestions? Thanks