We have new hood springs for 300C, D, and E made with larger diameter spring wire for more strength. These new springs will generally solve issues of a hood failing to stay up. Remove and replace springs by inserting multiple shims into a stretched spring. Click here for installation hints (best done as a two person job.) $175 a pair plus shipping. Contact K Simons at email: jkg@gradyresearch.com Contact K Simons at email: jkg@gradyresearch.com