Fix for the broken water pump pulley????

Fix for the broken water pump pulley????
Is it really fixed??
In a moment of cheapness, I decided to try and fix the water pump pulley, instead of buying a new one which comes with half the pump.
I glued the central metal core to the part of the pulley that was still intact, and after that dried, built up the rest of the pulley with epoxy putty. Since the AC and belt tensioner were also gone, I found some buna-N O-rings that fit nicely in the grooves of the motor output pulley and the water pump pulley. The pulley is not balanced, so it may shake apart? If I can get several minutes of run time, so I can see the condition of the rest of the system, I will be happy, and will break down and buy a new one.