Any way to increase air attacks?

[The Bandit]

I was wondering if there is any way to increase air attacks in GWX 3.0. So far I am just about at the end of a campaign where I have been using a Type IX (U-155) since 1941, in that time I HAVE been attacks by a B-24 once in the Caribbean sea, a Catalina off of Iceland, and once or twice a Sunderland and a Wellington with a Leigh Light. What I am wondering is, is there anything I can do to make the Bay of Biscay the grave yard that it became in 43 and 44. Sailing straight out of Lorient I can stay on the surface for days and days and days. I don't think I should have A/C pounce all over me wherever I go but, some how I am missing the gradual escalation of coastal command form the Ansons and Hudsons to the Wellingtons, Halifaxs and Liberators. Its 1945 now and I am just finishing up with a XXI but still very little activity from the AC. Is there any kind of mod to fix this or is it possible I have not installed GWX correctly or somthing I forgot to enable in JGME??
Edit by the way I have the vulerability of the Uboat set to 100%