There is no way 3555's are going to fly good, WAY WAY WAY underspined!!!! You should be right on with those 5575's you're just going to have to tune your bow better. Even if those 5575's are underspined you can just crank your poundage down to get in the right range.

This is why I ALWAYS paper tune before I go to bare shaft and or broadhead tuning. So you can see EXACTLY what the arrow is doing when it leaves your bow. THAT BEING SAID, AND THIS IS VERY IMPORTANT!!!!!!!!.....> follow a paper tuning guide, but don't rely on exactly what it says. Make adjustments in small increments because shooting carbons with a release you can have THE EXACT OPPOSITE of what the tear is telling you. I have seen it more times than I can count. A tear indicating a weak spine turned out to be because of a stiff spine. The key is moving in small increments and if things do not get better, do exactly the opposite of what that tear is SUPPOSED to mean.