Now onto the legs:

Note how my finger is pointing STRAIGHT DOWN.

Do the "off side" first, then you can lean back and get the near side to match.

On the rear, sometimes it is easiest to just pick it up, then place it down gently.

Place each rear leg, with your "pointing finger" STRAIGHT DOWN the hock. If you lift the rear, you may still need to adjust the feet a little. Turn the toes in slightly.

With the short tails we have, you will want to hold your hand in such a way as to make it look longer, or to cover up the how short it is.

Here is Robbie in a perfect stack. We worked perhaps 1/2 hour to get him to this point. I would suggest breaking down the steps, keeping training sessions shorter. Praise  and treat often!