I don't klnow much about lapping except the better the contact the better heat will travel between the two surfaces.... so the flater you can get it the better.
As to the RBX being diiferent to any other block is byond me.. except for the fact that the RBX is a B**** to mount properly so it could be that will be impacting on the results.
NB: Homebase rocks! Only place I can find locally that stocks the right sort of modding paraphanial.
~ Boli
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