LU 208 - Stanley 8

My first design for a spring-based joint seems to be going well, as far as part of the design goes. Everything joins together smoothly. Now, I just need to make a spring proper for the job. Not too relaxed, not too tense. Just right to apply force and be compressible. 
I don't want to get this wrong or it could be too weak or apply unneeded stress on the joint if I limit its rotation. The third spring in however, it rocketed right out! 
Definitely not using THAT one. Maybe for another thing. 
But, as I was about to clean up, I heard Hallthorr upstairs at my door. I went to greet him and I invited him inside. He said he had something to show me, on the promise of not telling anyone. So, I'm going to keep it and not detail it any further. 
...It was nice. 
After that, and some time talking together, he left to his home and I waved him goodbye for now.