We did discuss it, but probably more within the scope of lapping.
Thermal pastes have a cure time, which can add a variable to the test. Arctic Silver actually makes a paste especially for testing, but you have to contact them for it.
Pads may have a special curing procedure, which would involve heating it, to make it settle.
What it comes down to, either way, is repeatability.
A paste can be applied with a certain level of repeatability, as pHaestus has learned to do so well, but there's still going to be a little variance.
Not sure that pads are that much more repeatable, even after curing.
This is something I'll be investigating, once my testbench is up and running. Progress on the wbta site (see sig).
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