Have always had rubber rolls on my haybines. heston PT10, nh 479 and now gehl 2345.{Had a JD 530 with flail conditioner one year but didn't like it} the cows are gone and the weather has been so wet the past few years have virtually no alfalfa left. do mostly grass hay for the horse folks. Considering a new discbine for next year and was wondering if one with steel on steel rollers would do a better job of crimping the grass. I bought an old NI crusher this spring with steel on rubber rolls and ran that over a couple of fields a few hours after cutting and it really seemed to speed up the drying. What are you alls experiences with the different roll types? I know massy makes a steel roller unit. Does anyone else? Thanks