WC
I have enjoyed playing E mail tennis with you but we are not really advancing the cause, so it is probably time to agree to disagree on this point. But I will end by saying that in 25 years of working on the Chinook Mk1 and 2 including 5 years of instucting at the maintenance school I never once saw, adjusted, measured, pinned or taught anything remotely like you described. enjoy the sun out in Aus.
Kind Regards.
PS I'm now off down the opticians to get my eyes tested.
NC