I have been running two HB 36 footers on my two R72 for three years. The only trouble I have had was the center cylinder was leaking on the reel of one header. We did own two Macdon headers before the HB's and we had two rebuild the gear box on both of them every year that we had them(2 yrs)It also Had trouble with the short draper feeding right. They were 36 feet as well. In my eyes the HB are the best.