This short-dart shotgun cylinder is very well-designed and the print quality is excellent. Swapping in the cylinder was a breeze (although you do have to cut through solvent-weld in one place. I used an X-acto knife.)
Wanting a little increase in FPS, I also replaced the spring and removed the air restrictor—the internals of the Boomdozer are pretty finicky and this would not be a project for a novice modder. However, once I did finally get it reassembled and working, the results were very satisfying. The dart groupings are tight and they fly with a pleasing amount of pep!
As Dr. Flux describes in his video, there is a stupid amount of dead space in the plunger, so if you have a good way to fill that oddly shaped space, performance should be even better.