Building A Frame From Scratch Question

by Chris
(Australia)

If your building a frame from scratch and you have the forks and head stem angle you want. How do you determine the rest of the figures you need such as height, rake, and trail. I.E. when everything is on the jig ready to begin fab work, how do you set your head stem height to the forks you have brought. I've watched frame building dvd's and nothing tells you how to set your front end up. just how to stretch, what stretch is and how to peace it all together. Any tips would be of great help. Thanks. Any questions that require further explanation just ask on here or email me.