RE: Fresh water tank
When I ran out of water earlier this year a buddy gave me a full 7 gallon jug. No spout or funnel to pour it into my FW tank and after a few minutes of thinking I just used the winterizing hose to draw the water from the 7 gallon jug instead of the onboard FW tank. Worked like a charm and no need for any extra parts or fiddling around.
RE: Fast tongue jack
May want to check the wiring of the jack to the battery.
A few years ago I installed a power jack and didn’t pay close enough attention when making the electrical connection (2x6 volt batteries) which resulted in having only 6 volts feeding the jack. It worked but was extremely slow, like taking about 5-6 minutes to fully extend. A simple rewire to provide a full 12 volts fixed the problem