I got bored today at work and decided to rework the universal too holder before I get my machine running. It should provide more strength and stability between the legs of the Z axis. I also increased the thickness of the front of the mount to remove any flex that may occur from pulling forces. I can post the stl if someone would like it.
If you do it this way, you lose all that Z travel. Your tools should generally be as high as possible when using the cnc. Best case is always raise the bed up with blocks or something to get it close to the gantry. Leaving the z axis hanging this far really reduces rigidity.
Oh right… doh! Scratch this one lol