Did it! ARGGHHHH!!! Hahaha
Penetrated Scapa Flow in GWX and sunk the Revenge batteship and got out...and it was much more difficult than on the Stock shIII + SH commander!
First, on my way to Scapa Flow I am attacked by a pair of british planes who think it prudent to depth charge me

Lucky for me their aim was questionable to say the least and I suffered to ony minor damage to my flak and deck gun. Undetered I made my way to Scapa Flow. I reach the outskirts around noon and since, for the bloody first time it was clear skies and now wind around britain I waited submerged til nightfall. Then I crept my way in at 2 knots rigged for silent running. (entered from East enterance). I hugged the coast and avoided the sentry ships. However, just as I was manuering past the subnet I realised I had just under 50% oxygen!
Bad news, but I continued. I entered the bay, spotted my prize, and then planned my escape. I would exit West, via the mine field. So I line up my shot and fire off 3 torps from about 2500m and then procceed West torwards my exit. The first torp had the cheek to bounce of the hull!

The second hit just in from of the second gun turret and the third hit the jackpot...and moments later the entire ship exploded into a most satisfying ball of flame

So all the destroyers head at full speed towards the explosion and I quietly slip away. Unfortunatly my oxygen was running out fast, was down to about 25% so I increased speed to 1/3. Unfortunatly once things calmed down the destroyed returned to their posts and the western destroyer picked me up. I immediatly went to 2 knots and prayed. The destroyer decided to depth charge the area. Again, the flak and deck guns sustained damage but he was fireing blind. In a vain effort to find me he sailed in circles. I, however was hugged against the coast. In a brilliant tactical move the destroyer decided to go hover craft and slammed straigt into the beach! :rotfl:That was almost worth the whole trip! His friends gave up and I continued my egress. Now, as soon as I hit the mine field, with a patrol boat behind me and 2 destroyes in from of me, I run out of Oxygen! Great!

In a stroke of good luck it had hit nightfall again and al three ships where about 5k away so I surfaced for a little while, dived, exited the mine field, and observed the patrol patterns so I surfaced everytime the destroyers moved away from me. In the end I escaped and sunk a 31000 ton batteship! Woohoo!

Now that Knights cross is mine! And if it ain't I will go sulk in a corner.
Sorry to bore you all but after such a long and hard journey with my heart about to pop outta my head several times I just had to share it.
Thanks to all those who helped me accomplish this!