OK it is Friday - and try as I might, can't resist picking on the typo for 
a "larger thermal ass"... I guess you just mean "big-a**ed" components?

But seriously with SnPb we found we got away with one profile for pretty 
much all shapes and sizes of PCBs. With lead-free we have found it important 
to trim the basic recipe to suit each and every design, making sure we profile 
a scrap board with a thermocouple on those parts we are concerned about 
(both thermally senstive =low max reflow temp/small thermal Mass and large 
thermal Mass)

Nigel

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