I just checked the timing with a degree wheel, and my dial indicator. It falls within the parameters you give. The magnets are 180 degrees apart. I also weighed the 24-8 XOAR @ 136 grams. The only other prop I currently have is a MSC 24-10 that weighs 172 grams. I plan to use a spinner when I start flying later this week, so perhaps this will add to the rotating mass.
Z