o'clock positions. After contacting Z1 and being told they had never head of the problem, I attempted to sand the bore for a tighter fit. It was no where near a "light" sanding job. I ended up screwing up the trueness of the bore and started over again with a second set that a local guy hadn't installed yet.
The product is flawed and I do not recommend it to anyone. I'll be going with OEM 60mm pieces this winter.