by Nick on Wed Jan 25, 2006 3:24 pm
If I were you, and I might be finding myself in need of a similar solution...
I'd just find some bolts with the proper threading, and pick up four rubber bumper-type things from Home Depot that are designed for table or chair feet. Keep in mind, just like a grinder, an espresso machine, even a big 3-group, it likes to move to the left (as the portafilters are inserted).