Milling Machine Frame

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Milling Machine
Here is a simple Milling Machine Frame created using my parts library.
For details of the extrusion
http://www.thingiverse.com/thing:213749
For connectors please take a look at
http://www.thingiverse.com/thing:213819
For angles please take a look at
http://www.thingiverse.com/thing:213750
For slides please take a loot at
http://www.thingiverse.com/thing:213861
For actuator mounts please take a look at
http://www.thingiverse.com/thing:213762
For timing belt pulleys please take a look at
http://www.thingiverse.com/thing:214567
NOTES:
We are planning to get many of these parts molded so "makers" can buy em cheap and use for their projects. We need your feedback --
What other parts would you like added to the library?
What colors should different parts be molded in?
What would you build with it?
Would you like any parts modi