I don't use RepSnapper but if it works like the original RepRap Host software then you will never see it because you can only see loaded STL files, you can then move the objects and generate the gcode but
when you load gcode you see nothing.
In Skeinforge you position by using the Multiply module.
For a Makerbot you would set the center at 0,0.
For my Mendel I set the center at 100,100 this means that when I slice an object it will be centered at 100,100.
I then set my start.gcode such that I home x & y and set x and y to zero so 100, 100 is in the middle of my print bed.
Bob Morrison
Wörth am Rhein, Germany
"Luke, use the source!"
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