I use a spin pro trimmer. you should use this immediately during harvest, not dry. imo, using a machine w/dry herb will knock off even more trichs than what the trimmer will knock off during wet trimming. I love my spin pro, and will never go back to hand trimming. I just don't have time. I harvest 10-12 plants at a time, and they are normally 6' tall and produce nice yields. I did 10 plants last harvest in 6 hrs. it used to take me 10hrs for 6 plants hand trimming.
then I make iso oil from the trimmer bowl clean out. I pulled 10 grams last time.