What size motor are you using to run your scratter?
I believe that is 1/4 hp.
This video is using pears, but it shows a really neat old and awesomely designed cider press.
My orchard-owning nonagenarian friend had a single-basket setup with the exact same hardware. We used it our first year.
I grind my apples in a garbage disposal. I would be interested to compare juice output from a grinder as compared to a scratter device, Id guess its significantly higher from the grinder.