I do not agree with your ideas, and I have a few points, so this reply may be a bit bitty.
It seems to me that you are out to screw over all the Maintenance Organisations, do you have a grudge to bear against someone in particular???
In my experience, customer service only writes on the quote what engineering tells them!!
Also, most of the customers I have come across, if they don't understand the quote, they'll ask, come in and have a look, and ask for the U/S part back.
What happens if you miss something? (We are all human) You tell the customer that the check should be straight forward with no great complications, and then the MO finds a serious defect? Is that not just a reciepe for bad feeling, whether it be between you and the MO, You and the customer or the customer and the MO.
Just my opinion