I have an XTool Laser with the rotary attachment. What I noticed is that bottle shaped and long items have a tendency to wobble due to lack of support at the other end and are not level. Some other rotary attachments have a seperate part that supports the other end of the item. Xtools rotary does not. So I designed this Rotary helper to make sure items do not wobble and are level when laser etching.

The bulb attachment and main arm assembly requires a 608 bearing which you can get off Amazon the pushed into the arm bracket.

Link to Amazon for bearings - Amazon.com: 20 Pcs 608 2RS Ball Bearings – Bearing Steel and Double Rubber Sealed Miniature Deep Groove Ball Bearings (8mm x 22mm x 7mm) : Sports & Outdoors