Celcius Brand Percussion / Massage Gun - Replacement Actuator Arm

A replacement actuator arm (I'm not sure if this is the correct technical term) to repair a Celcius Percussion Gun (https://www.rebelsport.com.au/p/celsius-percussion-gun-637956.html) 

My original sheared off at the threaded end, not sure if it's a design flaw. I'm presuming the gun got dropped on the massager-end and this part took the brunt of the impact. The model has the cutout for the 20mm bearing and the same sized (or close enough) threading for the massager tip.

Initially printed at 30% infill but as it's a small part which takes a lot of mechanical stress, I reprinted at 100% infill, horizontally, with 999 walls as a strength-test with supports as it's fairly small.

My first upload, designed in Autodesk Fusion. Hope this helps someone out.