No replication success last time I spoke to HQ - I will forward them the things you are changing in UEFI and ask them to try. Have Corsair managed to shed any light on this from their side?
I haven't heard anything back from corsair, I might check in with them. In the mean time i swapped out the drive for a Samsung 840 Pro and everything is chugging along.
It's possible it might be down to this particular build of the drive as there were 3 hardware variants of the Force GT (22756, 22757, and 22758) each requiring it's own flavour of firmware. It would certainly explain why the engineering team have been unable to replicate with their test drive.
I even plugged that drive into a Z87-Pro machine and had similar boot issues. In one instance it failed to read the boot info, on the second go round it got as far as showing the windows logo and then just hung.