I share Jazz's concerns about the machine, I have seen the V profile and rejected it, even for a 3D printer. In most environments there is too much crap about to keep the grooves clean and if you are using a friction drive to move the gantry (which I am not sure about, some of their machines use a timing belt drive) then accuracy - forget it. If you wanted to mill ali on this machine you would have to take VERY light cuts to cut down gantry flexing.
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This is one idea I am happy to pass by.

Cheers,
Rob