The tool used to preload the bottom bracket bearings is very difficult to overtighten. The pinch bolts holding the cranks in place should be tightened using a torque wrench. The proper way is to tighten the first bolt, then the other, then go back to the first and back to the other twice more to make sure that both pinch bolts are at the same torque. If you do that you will almost never have problems with an HTII crank