Before you get too far down the ELS path, be aware that it works - mostly. After being out there for years, they are now coming to the realization that the method is unreliable for long threads.
Let me put forward my own method:
The last thread is the most recent on the subject. I ranted a little about ELS, and am perplexed that my system, that has worked 100% for me has failed to get any traction with anyone else.
Have a look. I would be interested in feedback from others as to why the the Electronic Threading may not have gained acceptance.
Weston Bye - Practitioner of the Electromechanical Arts - Author of The Mechatronist Column, Digital Machinist magazine