If anyone wants to test barrier skip like I have I made a script that auto does it for you(edited)
just make sure you are along the barrier with knockback removed
it'll clip you generally within half a second(edited)
I've been collecting data of the coordinates on the frame before Link clips to try and locate the exact position of the seam
The X coordinate seems to vary slightly but the Z coordinate is always exactly the same (-12086.728516)
I've also confirmed that if you have a perfect position you can clip in 1 frame from a stand still
so in theory you could avoid needing to run against the seam entirely, could just literally go right through it