Ahhh, the 12mm, 12pt bolts.
What's odd is I looked up the torque spec for those bolts in the service manual link above (which isn't working right now) and I remember thinking that what I read seemed very low. I instead looked up the torque spec for a 10mm, 1.50 pitch, 12.9 grade bolt and it was 50ft lbs. As far as I know 12.9 grade is as high as metric fasteners go, the spec you quoted above seems awful high. I'm not saying you are wrong, I'm just getting conflictig data from multiple sources.
Here is a metric torque chart:
Metric Bolt Specs
I wonder if I need to get under there and torque things down a bit.