Ultimaker Original UMO Z Stabilizer Ringing Layering

You will want to drill a hole directly above the Z Threaded Rod (there is allready a hole there...just enlarge it) the 12mm to 8mm convertor needs to fit through it i used a 16mm spade drill bit to enlarge the hole...

Print Parts. Attach 12mm to 8mm Convertor - you will want to screw it on (worked on my Ultimaker - enough so that theres a little clearance over the bearing) Attach the ball bearing holder... mounting holes are 5mm

Also you may notice that the nut (on Z axis) that creates travel may be wobbly... drill holes through the gantry walls around the nut and tighten with cable ties...