Your pin knot should be ok that close to the tip.
As I said before though a picture of the width profile will allow people to help with the tiller.
The correct bend for a bow is dictated by the width taper.
Width taper will dictate how the thickness tapers (or doesn't)
The thickness taper will dictate what the bend should look like.
If all these things aren't correct it's easy to end up with a slow, shocky bow