Hello rick67 I have a greenstar2000 and it does a good job on grasses and veggies.Is very efficent with the best tech. out there.I grow and juice 6-8 flats of barley grass a week.And love the performance and yield of the greenstar2000.The dual gear runs at a higher rpm than a single auger.This produces a bit more foam,I use olive oil to keep the foam down.If you want pictures of the grass and juice email me and I will send theme to you.Also checkout happyjuicer.com a juiceing info site.Good luck and happy juicing!!