Well done, Her Kaleun! Good luck on your second attempt.
Here's my report:
Dec 31, 1942. Grid BE, U-525 (IXC/40).
19:20 Detected a convoy heading SSE at 5kt.
Jan 1, 1943. 02:00 Reached attack position SE of the convoy.
02:45 Fired 4 torpedoes at Large Liner and Liberty cargo, distance 2.7 and 3.7 km. Heard 4 explosions, and both ships sank within few minutes.
Attacked by escorts untill 03:50, sustaining one DC hit. Minor damage and some flooding. Surfacing and preparing another attack.
09:00 Reached attack position SE of the convoy. The course and speed unchanged.
09:29 Fired 4 torpedoes at 2 Large Merchants, distance 4 and 4.2 km. Heard 3 explosions, followed by the bulkhead breaking sounds. Both ships went down within few minutes.
Escaped undetected NE and aborted further attacks.
Result: 71079 GRT