I am practicing triplets on guitar. I can play them at a decent speed accurately and I emphasis (alternating up/down strokes) the first of each set on the beat and can feel them internally up to a certain speed. If I up the speed then they start to feel more like even tuplets. or 16ths etc. Is it essential to keep feeling them as distinct sets of 3, because essentially when practicing like this, they might as well be 12ths of a 4/4 bar. I can't imagine still being able to feel distinct triplets when the speed gets high.