I don't think you will have any problem with standard pc water cooling parts. The pump that I use on my pc has been working for several years now without any hickups. I also wouldn't think you'll have any problems with standard tygon tubing with the amount of flexing you will be doing. I use this in my work and have never had any failures. It is plenty flexible and will be fine. One thing though - you are always taking a chance with water cooling and its close proximity to electronics. Keep this in mind when you are working on the design.