Good evening Leo,
hmm...would you be so kind to cross-check your Tratt list with the
Luftwaffe.cz list which implies he scored kills #29-38 [=10] in his Me 410 tour ?:
http://www.luftwaffe.cz/tratt.html
I'm looking forward to your answer because for the designation of the Me 410 top ace rank it might be really important if Tratt has 9 or 10 Me 410 kills.
Sincerely,
Michael