Frame Z question

[wannagettachevy]

Im doing my research and getting closer to the day I cut my frame, aka Z day. Anyways, itll be my first time doing one and im just looking for advice from others who have successfully z'd there way to the pavement.

my question is after the lines are drawn on the frame, and cuts made, what is the best way to re align the two seperate parts of frame? im thinking of making a little jig table to weld under the crossmember with some adjustable feet keeping it all level and square. any thoughts? thanks in advance guys.