[HGabor]

Correct. He downed 3 Hungarian Bf 109s while they were approaching the Veszprém airfield for landing:

101/3. Sq., Bf 109G, "W-0+??" - 1Lt. Balogh Károly (Charles) (KIA) at Nemesvámos.
101/3. Sq., Bf 109G, "W-0+52" - 2Lt. Bélaváry Pál (Paul) (KIA) already at Veszprém airfield, at the end of the landing strip. (See his color photo.)
101/3. Sq., Bf 109G-6/U2, "W-0+49" - 2Lt. Nánási Kálmán (OK) at Csopak, on the swampy shore of Lake Balaton.

It is hard to answer your question since there are waaaaay too many. (Vice versa!) Surely I have a long list with well identified pairs of victors-victims, but it is a sensitive topic as many cases could be considered as war crimes against defenseless pilots on open parachutes. (There were certain FGs in the 15th AAF where these cases were unusually common, compaired to other groups. Hungarian fighters usually did not commit this kind of crime, simply because -due to the large number of opponents- they could not afford to waste even a single shot on bailed out pilots, who got captured on the ground anyways. Therefore war crimes against American airmen were committed mainly on the ground by angry civilians.)

Gabor