Why would it be locked? @Roverdude, are you still working on this mod, or is this one lost due to time constraints?
And, in the answer to my own question, it works for the most part. Parachutes seem to need to be tweaked for the new flight model (they seem to do nothing, or very little anyway) and the attachment nodes need work, since they seem to allow only reverse attachment. The rockets need some balancing as well, because they're way overpowered. I tried out the fix @Xephan put in, and it seems to fix the top nodes, but the bottom ones are still a bit odd.