No, in the absence of having an endorsed pilot available, as the aircraft was 'single seat' in the front, the arrangement made by John Marshall (DCA) was that Harry S. (CFI) was to fly it for an hour or so, come back and tell me what it was like, then I would go and fly it 'for an hour or so', and on safe return, Harry signed the form.
I don't know who you 'endorsed', because Harry was the CFI and wasn't endorsed at the start of this exercise......
However, all was 'good' in the end, and I quite enjoyed the aeroplane.
Cheers