Here are a couple of pics of my "ghetto" NB mod that leaves the heatpipes in place, I have mounted an 80mm fan on it in a pull config since that pic was taken too btw
The cooler is a Thermalright HR-05 SLI/IFX
They have some nice products for NB / SB
/ Mosfett cooling
if you do decide to do away with the stock heatpipe arrangement.
As to my last post, mating surfaces, the two surfaces of the heatpipe cooler and the NB chip that touch, I always check to see they are making good contact by seperating them and checking to see how the TIM spread out after the initial application
This gives you the opportunity to adjust the quantity/application if required or bend/twist the heatpipes so the surfaces make good contact. My Black Ops had bad contact in one corner but a small bend of the heatpipes settled it flat on the NB chip again.
From your other post it appears the VNB is undervolting by .02V so your 1.45 may in fact only be 1.43V, I would bump it up one more notch (keep a close on the temp) and try the Blend Test again
Did you try setting the tRFC to auto and running the blend test?
Have you manually set any of the other memory settings or are they all on Auto?