Upgraded Type VIIB Vs.Standard Type VIIC

Hello all Kriegsmarine Aces

After a very successfull patrolling in March - April 1940 with,originally 10 ships (total tonnage 39999 tonns) sunk during the patrol,I was offered to change my highly upgraded U-49 Type VIIB (Engine Upgrade - Germania,KDB,New AFA Batteries,7th Flotilla Badging) into a standard Type VIIC.

I decided,not to do that,and I will explain why:

1.After Germania-Engine Upgrade the speed of my U-49 Type VIIB became just amazing.It's now possible to push up to 19 knots on calm sea surfaced,8 knots and a bit more submerged.Extemely agile submarine.

2.What are the benefits of Type VIIC?I virtually see no any more reasonable benefits,excepting extended patrolling distances.But,most "hunting areas" in Silent Hunter III lie in BF,AL,AM areas and you can easily patrol them with the range of Type VIIB.

3.In reality,during World War II Type VIIB was more effective than Type VIIC,I mean those versions earned most tonnage for Kriegsmarine (for example Gunter's Prien U-47 that torpedoed "Royal Oak" battleship).

So I decided to stay with my Type VIIB U-49,which I actually like very much,through the rest of the war.

What do you think about my choice?I would be glad to read your opinions.

Good Hunting to all Kriegsmarine Captains