Always been the same. New to company/low experience/ladder climbers, many other reasons but drivers at times will not endorse an MR.
Simple fact.
If there is something wrong, write the bloody thing up, know your rules re MEL and CASA/operational req's and advise the owner/operator/boss with straight forward statements, and confidence in what you have done and why. If there ends up being a situation, i.e you out the door, well the place was not worth it anyway. You might be out of a job but you are breathing and within the law!
Sorry, too many sherbets this arvo.