Well the New Auto Prime XR is not that expensive, and the shell holder set is about $15 or less from most places. The handle on the new one will not break. A friend of mine tried to break one pushing too hard on a crimped primer pocket. He managed to ruin a primer, and had a hard time getting the brass out of the shell holder. The tool still worked fine after that. I have one myself. I will say be gentle sliding the lid on, and off. The plastic tabs get brittle, and break if you do not. I still use mine it has primed many thousands of rounds, and is still going strong.
No matter how many times you do it and nothing happens it only takes something going wrong one time to kill you.