well it seems finally some good progress.
I like the idea of heat die with a standard IHS. should use some insulation board or similar for the IHS edges to rest on, so as not to transfer any heat through the supporting edges of the IHS. The insul. board would be permanent and grooved for locating the IHS edges possibly (as per Nik).
With regard to making the heat die flat - what methods have been used before? Is anything proven? The only thing I really know about is for example using a fine grinding wheel, but I'm not sure that meets the tolerances required here?
Regards to many testers and if there should be a standard heat die design - well standards are good yes, but if some flaw is inherent in the design then this will be replicated. Maybe better to produce guidelines for heat source and explain differences later (obviously things such as how flat the surface are need to be specified, but for example as discussed the heat source size may very depending on what size core one is trying to replicate).
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