Bowling ball equivalency
Hold your thumb and forefinger together in the shape of an "O" and bring it to about the size to fit a postage stamp.. Now.. picture taking a regular 16lb bowling ball and set it into that "O" and holding it up.. Thats about the equivalent of the maximum force per sq-in of the SC top surface. If we estimate the SC top at approx 16 in-sq, then the seal only needs to withstand 16 bowling balls of force. This would be roughly 4 bowling balls per bolt.
It would seem to me that with the close tolerances, and the prescribed thin layer of RTV copper, (and without doing the math to convert the torque to axial force partially cuz I can't recall it immediately) 10 lbs of torque per bolt would do the trick.
I like to start with lower torques and then move up, so for me its 5lbs. If there's a problem, then I tighten to 10.. 15.. etc.