I'm a noobe and after watching several LCI 6 point videos my question is why would you leave the back 4 levelers down while raising the front landing gear, wouldn't that put undue pressure on the back...
Because the Rear Jacks are plumbed together, Right together and Left together, so as you lift the front the increased pressure on the rear jacks causes the fluid to flow from the them into those middle jacks, thus keeping the pressure on the frame equal at all times.