Or possibly a how to not change gimbal springs depending on how you look at it. I was successful though. There are probably better gimbal springs that are the correct size for the jumper t16, but here's the ones i used.
https://www.amazon.com/gp/product/B00...
If anyone knows a better spring that doesn't require modification leave a link in the comments below.😉
The extra springs that came with my jumper t16 pro are softer than the stock springs. I wanted something similar to my spektrum dx6 spring tension.