+1 on the mounds but I bought a drum to replace it swearing to never have another sickle on the place, be it on a MOCO or plain sickle. I bought the drum because of fewer moving parts. Saw too many with braze repairs on the bottom of the mower all the way across the cutting area.
For my stemy hay I picked up a couple of crimpers. I don't mind having to make a second pass and unless the crop is stemy I don't have to use the crimper.