Wow. The variation is responses is staggering. If I was the OP I'd be curled up in a ball on the floor waiting for the apocalypse. There are so many variables in set up that there is no one right answer; I think it's great that folks are willing to provide what is working for them. My set-up (note the number of variables underlined):
I'm an old school, knees together rider (and I'm not going to change). I'm 6'4" with ~36' inseam - my femurs are long so my lower leg (tib/fib) is proportionally short. I'm riding size 10 Track 700's with BTS - forward lean on the rear boot, more upright in the front. I don't recall the spring colors but know that the top and bottom springs are not the same color; boots are not here so I can't go look at them. I generally use step-ins so they do have fin-techs, but I have standard bindings as well. All my bindings are TD3's. I'm goofy footed if that matters. The set-up for each board is similar, but not the same
I have a half-dozen boards, but run my Donek Metal Ax the most, followed by an older Donek GS with a Donek Plate when I want to go faster. Most of my riding is in the Midwest so runs are short with lift time for recovery - I can push every run all day without breaks.
Set up on the Metal Ax 177: I recall it being 21cm in width. I run 3 degree cant in the front and 6 degree in the rear, cants oriented with the low end to the mid-point in board running length (i.e. - long axis). Front binding at 55 degrees and rear at 50. They are sidewinder step-in. Binding width is 18.5 inches.
A quick count gets me over 25 variables in set up. Whew! What does this all mean?
1. Bring a wrench to the hill.
2. Change one thing at a time.
3. Have a knowledgeable person take a look at your riding (even a knowledgeable skier can be helpful in my experience - my race "coach" was a skier).
4. If you can't find someone local have someone video your riding from several angles and post it up for feedback. Be aware that you will get lots of great (and seemingly contradictory) advice.
We all mean well.