I tried out my UDM yesterday for the first time in months and it started to wobble pretty fiercely. It felt like it did when I had over the summer and you replaced it. I checked the orbit on the machine and it seemed to be tilted off-axis again. I was wondering if the warranty is still in effect for it. I purchased it in march of last year. Another thing I was wondering is, if it can be exchanged for the new UDM made by P-C.