Hi Wally,
I have the relevant volume of the "Nachtjagd Combat Archive", but there is no information about Dormann's aircraft on that night.
It just notes:
Hptm. Wilhelm Dormann 9./NJG1 Lancaster Woold, 4 Km S. Winterswijk (4D) 6000m 02.36 12 Sqn Lancaster W4925.
I think you already know all of this!