I have been working on, what appears to be a Kundo standard 55 (Based on Horolovar book). Plate photo included. According to the book, this uses suspension spring configuration 3C. I lined up all the parts on the new spring with the diagram in the book, and they match up. However, when I attempt to install the pendulum, the spring is too short. It draws the pendulum top all the way into the locking hole and there is still not enough length. Have I miss identified? Thoughts??