I have the 19†iPower, like UGF said I think they’re basically all the same except size. If you check them out on Amazon every model seems identical from the pics. I wouldn’t want any smaller than a 19â€. On it you can do one small auto, a decent photo usually fills it up 3-4 times. I’ve always dry trimmed because I can get a closer trim than wet so the first time I used it I hung my plant before running it through the spinner, big mistake. Definitely have to run them through wet then dry on a rack which made me completely change how I harvest but now that I’ve went through a few using it it’s no big deal. Way easier and faster than what I’ve always done. One of those ‘duh’ moments! You won’t be sorry and when done right it doesn’t hurt the buds one bit.