Anyone using a double ended spindle?  building a machine with crossed pair of double ended spindles and trying to figure out how to index the A axis 90 degrees for each tool on a "tool change".  From looking at the Fusion 360 sight the limited info I found is some machines handle it with an M code, others in the post.  Having touble getting the index in the post, but figured I could do a G52 shift in the M6 macro for each tool if I needed to.  Just wondering if anyone else out there has tackled this already.