I'm late in this post, but because it is a good reference for every person that buy a Celestron 127eq, I want to show my personal solution for the collimation problem of our telescope. The whole reference is in the following url:
http://www.taringa.net/posts/ebooks-...barlow%29.html
it is in spanish, but the images are better than words. Basically you only need to get a bottle cap of 40mm of diameter and you need to cut a 5mm in the side and make a hole in the top center of 1.5mm, put the modified cap in the bottom of the focuser, then you will be able to collimate it with a laser tool without the necessity of remove the internal barlow.