Just the sides would have been enough.? How wide is this machine.? Looks wide so I'll warn you belts this wide are not easily found and you may have to get them custom made.? I did and my machine looks narrower than yours.!
It's just over 1500mm wide, so gone back to slaved motors


While I'm here and commenting then got to say not keen on the Z axis setup either.? your putting all the weight of the stepper and screw with it's bearing blocks on the front plate.??
Changed it round as you suggested

Sorry to keep throwing curved balls but you keep sticking your head up .. .Lol
Keep throwing them Jazz, would rather i cock up on the design stage then make a lemon.

Click image for larger version. 

Name:	front corner.jpg 
Views:	660 
Size:	374.0 KB 
ID:	6626Click image for larger version. 

Name:	front measurement.jpg 
Views:	557 
Size:	243.4 KB 
ID:	6627Click image for larger version. 

Name:	front rear.jpg 
Views:	539 
Size:	293.9 KB 
ID:	6628Click image for larger version. 

Name:	Z axis.jpg 
Views:	589 
Size:	552.4 KB 
ID:	6629