I'm nervous pulling these off the arms and attaching other ones. Is it really as easy as ripping them off and slapping others on? Most of the time minis are fragile beings, and I worry about doing some permanent injury.
Yup. They may seem fragile but the heavy steam mini's are made of some durable stuff. I just rip the arm off and pop another on. the joint that holds the arm on has a hefty bulb to keep it in place. and I only surmise after 100+ removals/ additions would you start to see any noticible ware and tare.