Just for the record, you do not need a type IX to try this. Once France is taken and the bases moved to the French coast, a type VIIB/C is perfectly suitable for a trip to North America. Some of the operation drumbeat boats were VIIB's - like U-85, which was the first drumbeat loss for Germany (off Cape Hatteras in 14 April 1942).
In one of my very first careers back in 2005 with stock SHIII, I cruised to the Gulf of St. Lawrence in a VIIB in 1940 and returned to dock my boat back in France. You just need to cross the Atlantic at a nice steady 8 knots, and avoid any temptation to run down reported contacts on the way - save your fuel for hunting in the Gulf or off Newfoundland (and note your fuel consumption going over, so you'll know when you need to turn for home - and give yourself a decent safety margin too). I even sailed well up the St. Lawrence, although it gets to be tight quarters, and there are escorts patrolling around, so be wary of depth under keel!
P.S. for a good read, track down a copy of Steve Neary's
The Enemy On Our Doorstep: The German Attacks at Bell Island, Newfoundland, 1942
(1994, Jesperson Publishing Ltd., St. Johns, Canada).
my pic of the remains of one of the torpedoed ore carriers at Bell Is. (taken in 2003)
