I was only suggesting the process of how
i found my setup, not the end result. theres nothing you can read on the internet that will determine what your angles or stance should be, its all trial and error on your part to find what works for you.
your problem could also be technique related, especially the leg fatigue part.
When i first starting boarding i experienced similar leg fatigue and couldn't track the source. A year or two later i switched to this setup and the first time i set it up, I noticed i didn't have much leg fatigue and was able to board for a longer amount of time. Then just now when i re-did everything i'm experiencing the leg fatigue again. i think it is do the my current setup. I also noticed the current setup is making me lean back more, and put more pressure on my back leg. I'm not too sure why its making me lean back, but my guess is if i was more duck footed in the back, it would force me to center myself, instead of throwing my weight onto my back leg because its straighter.
Also, I need to move my bindings down closer to the heelside edge.
I don't live close to a mountain, so I need to commute(2 hours)...and when I get there, my buddies just want to ride. Not wait around for me to make adjustments, which I can understand.