I never printed one either (the sacred manual z-131 makes no mention of it), until pe suggested printing the strip and balancing the reference hd patch to neutral in order to have visual comparison.
BTW, I was able to get in control results with reels. It was the 3000 series drums that were giving me trouble.
The jobo is a nifty little machine, no doubt. But you'd have to be a pollyanna or have serious skin in this game to make the claim that it's capable of the consistency of a Refrema.