Table height

Currently the height of the optical table is 27.5" (see attached PDF). We would like to increase its height.

The legs are provided with a spacer http://www.newport.com/Pneumatic-Vibration-Isolators-with-Automatic-Re-Leveling/844255/1033/info.aspx 

which allow us to increase the height just by replacing the spacer (2.5").

The new spacers bring the height of the legs up to 28" (or 23.5") and the total height of the table up to 40"-41" (or 35"-36").

I ahave asked a quote for spacers which make the legs height equal to 28". They can come with flanges for horizontal bars. I have asked a quote

for this too.  We need to decide if this height is fine and if we want horizontal bars.