With the 3 line method here is what I did.
1) Feed the three tramp pieces into the side rails and cross beams.
2) If you choose to cinch the side rails in do so now with whatever apparatus you like.
3) Start at the front of the tramp. Tie one end of your lacing line to the first grommet with a bowline knot.
4) Feed the line through the grommets working aft and keeping tight the entire time.
5) When you reach the rear tie off the lacing line.
6) Pick one side of the rear part of the tramp to start on.
7) Feed one end of the next lacing line into the small hole on the rear corner casting. Tie a figure eight knot in the end so it won't pull through.
Begin lacing towards the center keeping the line tight.
9) When you reach the center tie off the lacing line and begin again on the opposite side of the tramp.
10) Remove any devices used to squeeze the frame.
11) For the first season w/ a new tramp you may have to retighten the lacing regualarly as the tramp will streach a bit.