I just realised something when I read makomk previous post (thanks for the info, by the way!): the unit MHash/s is not self-explanatory! To do one check if a nonce is golden or not, you need two calculations of a SHA-256 hash. When I gave my synthesis results previously, I interpreted 1Hash as one calculation of sha(sha(.)). Does everyone do the same or does your unit equate 2Hash to sha(sha(.)) ?