RE: Rear Table
The table can be locked in middle positions (partly raised), I do it all the
time to keep access to the storage under open.  BUT, the table will tend to
flp around, not be level.  A solution for this is to add a guide rod.
Simple to do.   A pice of 3/4" dowel and a dowel screw in one end then
screwed into the center of the lower bracket.  Now the table can be raised
up and down without twisting in the upper bracket.