The ball screws were the one thing that i have not touched on the machine yet, but it is cool to hear that they are accessible, would anyone be able to take a few pics of the tools you used and where you fed them in and such just to document for people who will attempt this later. I have thought about cutting a small window in the stand i made and i could easily lay on my back and reach through the window, but that would only take care of the Y axis. I am curious how to easily reach the X axis. Thanks for the updates, this is some great info