The piece snaps into place to hold the door open, jut like the original spring. I tried the "C" springs and they did absolutely nothing and probably would fall out. The hinge itself would have to be replaced to use those.

A day without laughter is a day wasted- Charlie Chaplin
When wrestling a grizzly bear, you have to keep at it until the bear gets tired, not when you get tired.
1948 Chevy 2-Ton