See my comment
http://foc-u.co.uk/index.php/topic,14772.msg168096.html#msg168096I slacken the bolts and torque them to 23Nm out of habit, however 23 Nm is not tight enough to lock the torque arm solid and it will move without damaging the arm, or pivots, but as I said previously:
Everybody knows the rule
"if in doubt swing out of it" 
There have been many occasions when adjusting the chains for others I have had difficulty in opening the bolts on the torque arm because of the
"if in doubt swing out of it" For the above reason I tell people to slacken off the pivot bolts and tighten them when finished adjusting the chain, and not to over tighten them afterwards, this prevents the "
if in doubt swing out of it" causing problems.
