Just finished my first patrol with Rub 1.43 the first 3 patrols were done with Rub 1.42.
I was playing at 100% realism, but it was my best ever patrol.
However i think a lot of it was down to luck on my part, i didn't have any dud torps and the escorts were green crews.
I was ordered to patrol AM79 (AN79?) the mouth of the Thames

. I hid until the 24hrs were up, while on the way to the usual killing grounds the V&W spotted me and charged to attack in a straight line. One aft torp later and he was dead.
While transiting around the north of Scotland we found a C2 which was helped on it's way with 2 torps under it's keel.
Found a convoy in AM1, well it's 2 Corvette escorts found me! One after another towards the aft tubes they went. Boom! glug glug glug they went.
With no more escorts (i thought!) the wolf was among the sheep. Over the next 10 hours i sank:-
2 T3's - one torp under the keel each.
2 C3's - two torps each.
1 Small tanker - one torp.
4 C2's - two with two torps and the other two with one torp each and finished off with Cannon fire (had 7 AP round only left).
So with the 3 torps for 3 warships, and 13 torps for the 9 transports i had 5 left.
Now did you notice the Aux Cruiser listed above? I didn't till it opened fire on me part way throught the attack
Luckily (for me!) one of my victims (C3 i think) drifted in the way and bought me time to submerge. Time for revenge! a spread of 3 torps were fired with a perfect solution.
Nothing.
I'd forgotten the running depth was set to 9m, just the same as the keel depth of hte Aux Cruiser. I was able to spin around and take a snap shot with the aft tubes and blow him out of the water.
I don't think my later war patrols wll be as easy.
(sorry for rambling)