Pointy Attachment for Percussive Back Massager Prospera PL888

This is an old, generic percussive (thumping) back massager that came with a couple heads, a rounded one and a bumpy one, and my spouse requested a pointier version of the rounded head to target muscles better.
I measured the threads on the device and tried to recreate them at the right size (1mm ISO threads with 1.5mm pitch) - no idea if I did that right, but my print did attach correctly.
Seems to work OK.
For reference, the massager is labeled "Tony Little Percussion Massager" (??), with Prospera as the manufacturer and the model number as PL888.

Print instructions

0.2mm layer height to keep the threads doable.
Infill I used 15% but it doesn't matter.