Do you know which Happ bezel is used to cover this particular monitor?  There are two listed on Happ's website that fit 27" monitors.  
49-0106-00    
   27" Monitor Bezel, Black Plastic
   29.5" x 29.25"    21" x 15.575"
49-1857-00
   27" Flat Screen Monitor Bezel, Black Plastic
   25.65" x 23.87"    21.19" x 16.13"
http://www.happcontrols.com/monitors/49010500.htmI'm pretty sure the tube isn't a flat screen, but I'm not certain why the regular bezel is almost 3" inches wider than the flat screen.  The reason I'm asking is that I want to make sure that my cabinet is wide enough to accommodate the bezel.  Do people normally cut them down some or no?  29.5" seems to be a bit larger than the cabinet plans I've been seeing around the net. 
Further more it doesn't look like the inside bezel dimensions match the monitor dimensions:
# Height: 23"
# Width: 235" <--- says the website, but I'm guessing it's probably 23.5"
# Length: 25" 
http://www.betson.com/products/IMP-44-4070-RTThis whole bezel thing is confusing! 

Thanks!
Jeff