Well, I did re-torque the motor mounts and I must say that there definitely is some improvement. Do not get me wrong, it is still nowhere nearly as smooth as my buddy's DR, but some improvement exists. At least now it seems OK-ish at 70km/h in 3rd and 90km/h in 4th gear, previously it wasn't. It seems that the engine mounts were tightened to well over 100Nm. At least they required over 100Nm to break loose. I re-tightened them in criss cross pattern to the specified torque of 65Nm.