Ecentric on both ends

[jumpinjimmy]

Hi every one I am brand new to the forum, I am a maintenance mechanic/ machinist , I have been working with manual lathes and mill for the better part of 20 years, I make parts for the company I work for to cut costs and speed up repair time.
I have a bad shaft on a machine that has an ecentric on both ends that must be in time with each other or the same place ?
I can cut the ecentric on one end with no problem , my problem is how do cut the other and have the in time with each other?
My first thoughts are to build a split collar to put on the shaft and cut it with my first ecentric , so when I turn it around I can chuck the ecentric in a 3 jaw chuck and steady rest split collar to give me a true center line to center drill the other end.
any help would be very nice. thanks