Hello fabio maybe you should contact the seller of the kamut seed and express your dissatisfaction.How was the juice of the kamut compared to the spring wheat?Was it sweeter,have a more distinct flavor,any notiseable differance?And about your kempo,is it the twin gear model?An if so do you have any foaming issues with juicing wheatgrass?If you like growing grass try a little barley.Thick blades with an awsome yield,but tastes a bit strong.Some pictures would be sweet if you wouldnt mind.Good luck and happygrowing!!