Thanks for the comments, Dave! This was probably my most or 2nd toughest build ever. The spring was the primary reason. Unlike other regular springs, this had so many crooked angles, as well as that nub, which actually travels into the well of the smaller blade, for the smaller blade to release the larger blades' lock. That spring also supports the corkscrew! Every hole had to be just right. I also had to fabricate a new bolster.
It was a fun and frustrating build, and Dave was quite patient as I schemed and tinkered with making the spring work. Thanks!