Im allergic against rubber , so for me it is a pro
I just used Guntape on my Spawn/Xonret II and MM520 or any other mice with rubber on the sides
U cant swap the shells , because they changed the Sensorposition and some more
You can also use 3M Clear Bra if you don't want to affect the dimensions at all. It's polyurethane-based so it grips well, and it's smooth.