Legality of grabbing coopertition stack of 2 from the step

[Tungrus]

Originally Posted by blueorange

Just wondering...........
... 4 yellow totes (2 of which are already inside the internal stacker) and place the assembled 4-stack on the step for full Coopertition Stack points?

Yellow totes score on Auton and/or coopertition stack only (as far as I read the rules).

Even if it is allowed, would you rather have 40 points for coopertition or 4 to 12 points by stacking (assuming you can stack more higher than 4 tores)?