German Moskito TA154 in operational service?

[Griffon]

there is a new book by Dietmar Herrmann about the 154 available too, but it differs from what Griehl has published in some points, so I cannot provide any specific answers.
but it seems that while several sorties were flown, no known kills were achieved with the 154, although one LW officer indicated that a crew might have achieved one kill flying the 154.