Is it just me, or are the equations not updating on the fly in SP3?  Maybe I don't use them enough and they never update the instant you change the value of something the equation relies on.  They are supposed to change right away, right?  Like, if I've got an equation that says: "D1@Sketch6" = "D2@Sketch6", and I change D1 from 0.25 to 0.175, shouldn't D2 change without exiting the sketch?