This is what we run no complaints , just wish we didn't have the flipover reel hate that thing and the air bar can,t be set quite right with the flipover
you'd want the air bar vs the reel with the draper headers. can't get the right air flow angle into the heads with the reel. not saying it wouldn't work, just would work better with the bar.Wish we could have the crary air reel put on from the factory. That would be the perfect head. Thought abought putting just the air bar on but don't think it would work in my conditions with tall green steam beans.
the advantage with the gear box is efficiency. don't remember the hp you loose with the belt, think it was around 10%. not sure which drive is better imo.The fan is belt driven three years on this one .We have run air bars since 1995 always belt driven only replaced one belt trade headers about every 6 years