Is there a chance I could split the end of the arrow by turning too much?
Darn right there is! You've just got to fly by the seat of your pants when you tighten them down. Make a little tweak and make a test twist on the nock to see how snug it is. You just want them snug enough to resist twisting, not tight enough to lock into place.
I can't stand GoldTip nocks. They're too tight and have a double snap. I'm with Rangeball about canning them and using better replacements.