This is an upgrade for the Chavo A8 to get rid of Z wobble.
Here is the link to the frame:
I have uploaded 2 versions. One ("Inch") is for the regular 3/16 inch thickness of the frame, and the other (5mm) is meant for a 5mm thickness. The part was modeled in AutoCAD and then converted to a SketchUp file in case anyone would like to modify it to their needs. SketchUp has a plugin that allows you to create .stl files.
Here is a link to that plugin:
Balls Bearing 608ZZ ID/Bore 8mm/22mm/7mm
Place the Ball bearing inside the Z Wobble hole and then place it on the frame part as shown in the pictures.