Good afternoon Peter,
this book
https://books.google.de/books?id=ea4...felder&f=false
offers the following (translated): "
Werner Thierfelder 27, 6 West, 41 destroyed on the ground...it is supposed to be certain that the successes of the following pilots and radiomen were achieved with the Bf110: (Thierfelder is mentioned among others including Tratt)".
Michael