This is a remix of the Anti-Gravitator. Here is is in action https://www.youtube.com/watch?v=TR4PU5eDIaI
I made my own spool holder which I printed two of and put them together using the nut described in the original thing.
Made bottom cover with two screw holes. You can use M3x16mm taking into account that the bottom part hoislder of V4 from the original thing.
I also made Potentiometer handle that I printed using 0.25 mm nozzle and glue it with superglue.
I am uploading Sketchup files, feel free to modify and use as you wish.
Electronics: I have used electronics from this remix http://www.thingiverse.com/thing:1982994 which was really easy and nice to build. Worked just perfect. So for instruction read up there.
I made a lot of pictures so you get the idea how the build process works. For build instructions read up on the original thing and remix mentioned above.