How to level rousseau router table insert

I bought a used rousseau router table (model 3350) from a friend for $100. It is a nice table, but needs some tuning.
I found a link to the manual: http://www.rousseauco.com/pdfmanuals/3350dl-1.pdf The page no longer exists. If anyone has this manual - I would appreciate it if I could get it from someone.
It seems like the table is in a condition where the insert is not installed properly. It is held to the table with 4 countersunk screws on top, and spacers, clips and nuts on the bottom. The insert sits recessed into the table. The shelf that the insert sits on has six threaded nuts embedded into the table, 4 in the corners and two on the sides. My guess is that screws can be installed from the bottom of the table through these nuts to create adjustabilty for leveling the instert. Is this correct? What would prevent these screws from vibrating out of level or vibrating completely out of the table?
The plywood which is on the face of the fence seems to protrude more on the second fence board than the first. When feeding material along the fence, it catches on the second fence board. Is this something that requires adjustment or do the fence boards need to be replaced.
If you own this table - or can offer any help, I would appreciate it.
Thanks, John Carney
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John Carney said:

I own a Rousseau insert, I wish I had gotten the Rockwell instead. But to answer part of your question, the 6 brass inserts accept nylon screws from the bottom of the table, and are used to level the insert. The friction of the nylon screws keeps them from vibrating out - theoretically.
Greg G.
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