member3480
RICH
I have built a bunch with out a jig. So as long as the table you are using is level side to side front to back mount the frame to the table and level frame to table. You can use string but I use a stiff flat iron and measure out the bottom in inches or I have just used a ruler . Find the center of the neck and use that as your front mark and make two equal marks on plates. I have a 6' level and have use that also and just made the marks on the level and measured . I would just cut the old ones off clean up the tubes and reweld . I would not fool with those at all.