This was my least favorite bussard collector of all time, and I don't like making any of them so that's saying a lot! There's no "base" for this part and it's also out of scale with the housing, so I had to make it up some. I glued bond paper tabs colored with silver Sharpie around the inside edge, curled and glued the blue housing strip, and cut off the excess at the bottom. I glued the red and blue base part to 1mm cardboard for some stability. I had to trim it to get it to fit, and it doesn't look great. It was trial and error.
The collector end is designed as one curled part, which I can't make. So, I cut the bottom part of the ring off, curled the top part, and glued it back together. The rest of the collector is one part that you have to slit, curl and fold to make it come together and it is terrible! If I could have found any kind of domed substitute I would have. Like the other parts, this one is out of scale and too big. So, I started from top center and curled it until I got the shape I needed, cut off the excess and glued it in place. I cut some tiny strips of bond paper, colored them and glued them in the end to give the end cap something to hold on to. A last bit of glueing and I had what looked more like an angry lipstick than a bussard collector! Now I have to do it all again for the other engine!