I just picked up a 2104S (2015 model) last month and the Lippert tongue jack has a 3/4 in. nut for manual raising and lowering. It seemed fairly easy to raise and lower using a speed wrench and socket, that is until you get the full weight of the trailer. I reverted back to the electric mode when the resistance started. My next tool of choice for raising or lowering would have been a long 1/2 drive ratchet with a 3/4 in drive socket.
By the way, these trailers don't come with a lug wrench for changing tires either. The lugnuts are also 3/4 in. In theory, I suppose you could use the lugnut wrench on the tongue jack if you got in a bind?