You need to hear from someone who has experience with the machines, especially the same size and design as yours. From what I've read those small shredders are very limited in what they can do, because of both strength and engine power. People seem to complain about them on both grounds. If you reduce the power, when that is a feature that is already a limitation, you may be even more dissatisfied than other people seem to be. Of course if you will only ever put soft green leafy stuff in it, perhaps it wouldn't matter, but when you get to small branches, a 20% reduction in power may be a big issue.
