Then while it was cooling down, I use pressure for the injector. It filled most of the crack but I had a tough time filling the ends. Using my finger to apply pressure inside the glass and also using a scribe on the outside helped, but when I released the pressure, the resin would move away from the ends. Then i remembered I bought a crack expander and used it inside the windshield. It filled up the ends but I can still see a line. It was getting late so with the expander still on there, I removed the injector..then applied pit resin and cured it. I then checked the area and all the lines are gone!! Is it because once the resin goes in the edges already, small remains are still there and enough to cure the crack together?
Just wanted to share my experience.

I have some few questions:
Are these small cracks one of the hardest to fill and work with?
I used a centerpunch from Delta to try to create a star but everytime I tried, it'll create a star with a nasty piece of surface glass missing.