Hi Manny, I am having trouble playing 16th notes legato. For some reason when I have a group they come out short. The place I'm having this trouble is in the Arutunian. The first fast section. Bar 35 and 39. I have been playing it around 155 tempo. I can play other fast double tonguing things ok. The rest of the concerto is fine. I have tried slowing it down. It sounds ok at about 140. Do you have any ideas?