This build, as is, should work. If you use all the parts listed, it should work. What it needs is some tweaking, not more parts. once i had this thing built and running, I took it apart 4 or 5 times before it actually worked right. For me, tweaking the distance of the fan to the top of the box was what got it working right. IIRC, i even put up some pictures of it pages back. I did omit the SS washer and glued the magnet right to the fan, and mine still works. I guess the epoxy I used wasn't quick drying, and I was able to move it after it was glued down to get it dead center. If you put it together and it doesn't work, tweak the distance a little until you get it right. The extra parts really aren't necessary.