Here's the slosh proof gas cap vent part I came up with...
Consists of a short length of 1" nylon rod turned down to size, drilled 1/16th and 5/64ths in a couple places and then I made up a leather gasket to seal things up...pretty simple deal and it should work just peachy. Next time I get outside to paint something I'll spray the cap itself with some flat black.
I think that's all folks...if any serious issues pop up or I add something else to the tank I'll post
Drilled holes were hi-lighted with a sharpie so they could be seen clearly in the pictures.