Got a few more parts from Illusion today. After some issues fiddling with the hop up, I got the parts in. Sadly, the spring cap thing doesn't stick out all the way because of the barrel bushing, but it looks nice regardless. Oddly, a tiny square about the size of an eraser scrap fell out of the frame when I was putting the slide back together. I can't figure out where it goes, but everything seems to work...