New Holland H7220 - H7230 Steel Conditioning Rollers?????

I have an operators manual for the New Holland discbine H7220. In it is shown adjustment for rubber rollers and STEEL rollers.

The online parts diagrams show replacement steel rollers, in addition to the traditional rubber rollers, for the H7230 only.

The brochure for the H7220 / H7230 discbines do not show steel rollers as an option. It is only in wider models that steel rollers are offered.

Question is - are steel rollers really offered as an option for the H7220 and H7230 discbines? Anyone have one of these models and if so - what are your thoughts regarding them equipped with steel on steel rollers.

Thanks!
Bill

New Holland H7220 - H7230 Steel Conditioning Rollers?????