Hi Fred,
Youv'e got me by the short and curlies here having to explain in writing, but here goes. (if you dont understand PM your phone number and I'll explain.
First and foremost you must use Greased Weasel shockleader, it wont work as well on others.
Using a lighter or match, close to but not on the end of the "shock", heat it up until a little mushroom appears. Remove heat. Then using your mainline, tie a four turn DOUBLE GRINNER onto the shockleader. By using a double grinner it leaves the tag end of the mainline parrallel with the shockleader. Moisten the knot on the mainline and pull it up tight to the mushroom on the shockleader. Trim the tag end and put a little blob of super glue on both sides of the knot , this seals it and leaves nice round ends to the knot that does'nt snag the rings. It is the neatest way of joining a mainline to a shockleader.
Wow, I hope I got that right and that you understand, if you have a problem let me know. I am sure that your local tackle dealer will show you how.
No doubt someone one will come back and tell us that it is useless, but I can assure you that I have been using this method for a number of years now and never has the mainline and shockleader come apart .
Cheers
Drew