Dura-Ace Crank Arm Pinch Bolt length

[zmalwo]

So Dura-Ace left crank arms use M6x15mm tapered steel pinch bolts, but every time I tighten the bolts to 12NM I'm afraid to strip the alloy crank arm threads. is anyone using the longer M6x18mm or M6x20mm bolts on them? I'm thinking about ordering two of those Ti ones. Also, has anyone here ever seen a stripped Shimano HollowtechII crank arm before?

[oldpotatoe]

So Dura-Ace left crank arms use M6x15mm tapered steel pinch bolts, but every time I tighten the bolts to 12NM I'm afraid to strip the alloy crank arm threads. is anyone using the longer M6x18mm or M6x20mm bolts on them? I'm thinking about ordering two of those Ti ones. Also, has anyone here ever seen a stripped Shimano HollowtechII crank arm before?

I have installed more than a few and have never stripped one nor have I seen one stripped. Seen more than a few over tightened. Low torque with ti bolts is really no big deal but I think if you use a torque wrench, as you do, I doubt you will strip the crank.