I am helping a bunch of middle/high-school students with a project to make a small computer controlled water jet cutter. A Raspberry Pi (RPi) will be used for control. I can use all the help/advice/wisdom that anyone here can provide: 1) We want to use as many off-the-shelf parts. So, we were thinking of using the C-beam bundle as a starting point. C-Beam Machine Mechanical Bundle We are using this bundle to: a) Provide the mechanical frame for the water jet cutter b) For the motors to drive the screws along x, y and z axes & drive the motors from the RPi. Any comments? We were concerned that this was a little expensive, but felt that the Aluminum cage was strong and offered the movement that we desired. If there is a part set that accomplishes this cheaper, that would be of interest. 2) Is there any issue interfacing with the RPi? Specifically, with driving the x,y,z axes motors in an automated fashion. 3) This is a water jet cutter. So, there will be water splashing. We plan to use a plexiglass enclosure around the cutting area. But are there any other issues? This is our first attempt at this kind of a project. So, if we are completely off, let us know that too. Thanks.