Sorry about my confusion regarding the appropriate terminology.
David - I do not question your extensive knowledge and experience with MGF / TFs but I am just wondering why the workshop manual describes the 'L' bracket (under 'F') as 'these give glass height adjustment (this is also the glass stop)', if it does not make contact. Also, there is piece that sticks out of the glass retention assembly - is this not meant to make contact with the bracket? If not, what is it for? Why is the L bracket even there if it does make contact with anything?