Modifier File to add fuzzy skin to the handles only. Not perfect but works quite well.

The world coordinates for the modifier are X: 0, Y: 4.30 and Z: 8.39.

Takes some time getting it into the right place so make sure it looks like the pictures attached.

Set whole model to fuzzy and the modifier part to non fuzzy.

Better Instructions from the comments :

To get the 3mf file to work:
- Right click the Support blocker switch v7 object and clicked Add Object. Then selected switch_controller_7.stl as a Part.
- Set the switch_controller_7 position to 0,0,0
- Set the Support blocker switch v7 position to 0, 4.3, 8.39
- Right click top level combined object > Add Settings > Fuzzy Skin On
- Right click Support blocker switch v7 and Change Type to Modifier.
- Right click Support blocker switch v7 > Add Settings > Fuzzy Skin On

Optional:
Set Height Range Modifier for the button hinge. Use for more infill, smaller layer lines, etc.