Hi Bodger,
See, I sort of took your advice? That's exactly the one we have. It's very efficient, I can use it by myself and it's very quick to press. The most we've loaded into it is 40kg of crushed apples and that was maybe 2/3rd full - so big capacity which I imagine would suit you. Downsides:
1) You have to use it outside really (but I think you press outside anyway) because it's just fed with a hose and when the pressure reaches the desired level (I.e. the balloon inside has expanded right to the edges of the tank), the valve underneath just opens and you have water at tap pressure pouring everywhere. Very hard to prevent unless you're standing there just at the right moment to shut off the inlet valve.
2) Turnaround time is not great because you have to empty all that water out (also all over the floor) before you can load the next batch. This can take five to ten minutes. Not sure what you can manage with your traditional presses?
3) There's a sort of filter cloth (not a very fine filter) which sits between the apples and the metal outcase. It stops some of the gunk getting though and I imagine stops the apple coming into direct contact with the metal which should help prevent it oxidising. However, I've yet to work out how to clean it hygienically. If you're doing back to back pressing it should be fine for the day. But at some point you have to get the bits of apple out and give it a good wash and I don't think it would be open to boiling water. I keep meaning to ask Vigo how others clean it but I think we may have done our last batch for the season (and it's still sitting in the kitchen sink!).
I reckon I can do a full load (or as full as we've got) of apple cleaning, crushing, pressing and cleaning up all the equipment afterwards in about an hour and a half. Quite a lot of that time is cleaning up afterwards!
H