Ahhhhhhh hold on. DO post the code. Because I think I may have the answer for you!
It all depends on DIRECTION. So the Z is the flipping issue, when the forward is -X or -Y, right? What if it’s -X AND -Y? Because we can fix this with booleans! We just need to know what happens to the Z if:
-X, +Y
+X, -Y
-X, -Y
Because basically, if it’s going to get flipped, you’ll MULTIPLY the Z by -1 (to re-invert it) if it’s going to be inverted! If we can get the cause in concrete we can solve it.