Ver2 : Anti-Vibration Feet for Makerbot / Wanhao / Ultimaker etc

*** My new foot at http://www.thingiverse.com/thing:1367244 works a lot better than this ***

This is an updated version of http://www.thingiverse.com/thing:659940
After 3 weeks of use, I found that the front support had compressed by about 5mm and the rear by about 10mm and also deformed sideways slightly due to the weight of the spools and PSU. These modified feet are to take that into account.
I've extended the inners of the upper and lower foot parts and changed the recommended leng