Yes, they can do four 4x5" / 9x12cm, two 5x7" /13x18cm or one 8x10".

If doing film, create some ridges on the base to stop the film sticking. I've used some insulating tape with a small wire running lengthways - that way there's no permanent modification. I've seen some people make a bead of epoxy, others will grind out indents.

You don't need the motorised base. Hand "wobbling" works fine, and using 150ml of developer solution you get evenly developed negs every time. They're super easy to load and unload, even in a dark bag. I've not had a single issue myself, and highly recommend them.