This may be a "too early to answer" question, but maybe somewhere out there is trying this.

I have 2 Multiface 1,s.  I wish to go to a 2012 macbookpro 15" . I also want to be able to use Samplitude in bootcamp or parallel,s. I want to have a pcie connection to achieve lowest latency for triggering vsti,s drum sequences, etc. So!!  has anyone tried to use hdspe pcie cards in a sonnet or equivalent thuderbolt expansion chassis?  what latencies have been achieved and will bootcamp audio work running Samplitude? I know there have been issues with the express card to thunderbolt adapter, and that bootcamp audio with samp was not achievable, where as fireface 800 and 400 using firewire on macbookpros had some success.

any experiences or advise would be gratefuly recieved

Don Bate