Yeah, i'm using the TR bolt thru kit from my old TRU. It's not filed and it fits about 0.5mm above the
NB heatsink. By filing it i would probably not be able to mount it the way i want.
Another user, on another forum, is using Xigmatek's kit with the same
DFI X48-T2R motherboard and he can't mount the thing horizontally because of the
NB heatsink getting in the way.
Here's a
pic to see what i'm talking about. Just fits above
NB. Click to enlarge... you can see how those thing protrude thru the
mobo.
Here are my temperatures with it mounted like this by the way.