Ello All:)

Today my instructor is gone to a conference for the school. So i can not ask him any questions. In the pic bellow, i am on step 3. Step 1 and 2 were to create a sketch, then revolve it. Step 3 is to create a new work plane.

I know how to create the new work plane and i see the steps involved, but the book does not tell me WHY i need to. it just says do this and that and your done.

Before i ask you why i have to, let me tell you why i THINK i need to. this way, at least im doing my part of thinking before just asking haha

Since the part is called center ball joint and it looks like a (plus) sign or a star wrench you change tires with, i assume the new plane is to be put into the center of the first revolved part, so i can create the other half because the right plane is not in the center of the part??? does this sound plausible?

thank you