Hi Bar81,
While it is true that we often show prototypes at trade shows, we (usually!) get it right before we start shipping production units. Both the C-5xe MP and the CX-7 MP are shipping now and have been for over a month.
The difference is the upgrade kits. We can upgrade a C-5xe right now (and have been taking appointments for over a month). However, the CX-7e MP *upgrade kit* is not ready yet. I would expect that we will be taking appointments sometime in April, but won't take appointments until the upgrade is ready.