Yet another set of feet for the ultimaker!
Update: use the customizer for your own height: http://www.thingiverse.com/apps/customizer/run?thing_id=25438
These are fully parametric, so that you can adjust the height and more from the constants. You can even tune the edge roundness ;)
I needed them for a 50mm power supply upgrade, and those I could find on thingiverse did not suit me (imho, either ugly or non parametric, or both).
There is a hole tailored to the bolts that come with the ultimaker, so you can add a soft pad below the feet then, or just screw one for a thighter fit.
I needed this for the single (big) power supply I added under my printer (see pic) which powers my hotbed and main board (check http://betterprinter.blogspot.fr/2012/10/homemade-heated-bed.html)
You need 4 of these, where 2 of them must be mirrored (X or Y) of course!
I used 35% infill and 1.2mm wall thickness, and 0.2mm layer height so that it took me ~40 minutes at 60mm/s (uuh). Some more material still could be removed from the design without fragilizing too much the foot, just tell me and I'll do it.
The external walls are thin, but they are nicer this way imho, though the interior is quite robust. Just plug them in place and they should stay, but you can also screw a bolt from the bottom side for added pressure if ever they wear out (did not happen to me yet). There is some room to flush the bolt head and avoid scratching your table.
Still sorry for this ugly color, but I'll start using some nicer colors when I know better how to tune my printer ;)