We're scared full custom ASIC is great!!!!! You would invest probably more than whole BTC worth then if you would go with say 45-nm!!!! You are serious player  I think this is the time, when security of SHA256 for block-chain generation should be .... IMPROVED   But let's go step by step  First deliver mini-rigs with nice performance and cost, then ASIC, then do buy-in, and then everything would be secure, under NDA of course Or ? Will you start again taking money for future product with "variable" performance ?