We have custom made three models body frame based on XY stages we're carrying for reference; 600x400, 900x600, and 1200x600
For 640 and 960 stage, we used 30mm aluminum but we have to use 40mm for the 1200x900 because of weight and the size
See more info:
http://www.lightobject.info/viewtopic.php?f=16&t=1977(note: XY stage in pictures is optional)
Marco
Lightobject.com