Kiel Canal and Fueling Up

[btaft]

I decided to start a new career in 1939 with my trusty Type II out of Kiel using GWX 1.3. With it's limited range I have encountered a couple of challenges.

1) Is there anyway to keep the TC in the Kiel Canal to keep on reverting to 4x in the angled portions. Which cfg parameter do I need to change to keep from jumping out of TC. Note: I am using the pre-plotted course from the GWX search pattern for the Kiel Canal

2) Is there a way to "pull into" a base to just fuel up without having to wait 30 days and effectively being put on a different patrol? This is more of a stock SH3 question but I find that traveling at ahead slow I still burn about 1/2 of my tank just getting to my patrol grid.

Any help is appreciated