Review on Cane Creek Crown Race Install Tool 40MM (1.5) for Easy and Precise Crown Race Seat Installation by John May

I'm having trouble finding the right tool to install the crown cage (the ring that the sealed headset bearing sits on) for my Cane Creek IS52. This part is the same shape as the crown track itself, making it the exact opposite of what I need to set up the crown track. I don't know what it's supposed to be for as nobody should be using a bearing to push in a headset cup or anything like that this tool allows for. I plan on rolling my own and probably turning a piece of material on a lathe or something.