Thanks for the advice ray, but don't worry about that in my case. I finished my first career in the vanilla game and started a second before I tried TMO, and while I did have a bug issue with it (Tambor class (after starting with a Gar, go figure) for my second boat that was refitted and ended up with a bow deck gun, which means it was situated where one of the AA guns was also installed, and I couldn't crew the thing, talk about slow rate of fire! LOL) I chose a Porpoise boat for the starter in the new career and now have a Gar, in which I'm now on my second patrol. Also I still need to try the RSRD campaign for TMO, not to mention the other career options as well, so im afraid it will be quite some time before I'm ready for RFB.