I've done it and was very surprised when i tried to mount my TRU in the way i like it. I read that it doesn't fit unless you chop off 1cm from the NB heatsink. Guess that's correct only for the TRUE with the 6 heatpipes.
Re-did the SB and PWM with AS5 instead of that stock paste they used and got a 5-7C drop under load. Made it smell nice too with some of Jean Paul's stuff. Happy camper here. :)
http://ocidb.com/albums/userpics/101...l_IMG_3022.jpg
http://ocidb.com/albums/userpics/101...l_IMG_3023.jpg
http://ocidb.com/albums/userpics/101...l_IMG_3024.jpg
http://ocidb.com/albums/userpics/101...l_IMG_3025.jpg
http://ocidb.com/albums/userpics/101...l_IMG_3030.jpg
Idle
http://ocidb.com/albums/userpics/101...l_afteras5.JPG
Load
http://ocidb.com/albums/userpics/101...eras5_load.JPG