It brings me no end of relief that as of about 30 minutes ago the visa paperwork is heading towards Travcour, removing the "I've got to get this done" stress.
Until the Turkmenistan Letter of Invitation arrives I'll have that hanging over me, but there is nothing I can do about that; I just have to wait for the embassy to issue it and then hope they issue the visa in time.
The visa stress will only be really relieved once I've got my passport back in my hands and I can see them and check they are all OK, but it is a huge relief to get everything sent and the process started.