I made one! And got it working ^_^
I've got this rather than pictures.
I had to file off a little bit of the Havokfire shell to make it work. Sparks flew when I tried to increase the rate of fire!
In the future, please refrain from making a post in modifications that contains only a video link. If you wish to show off a mod you've done, feel free to post some photos in the stickied mod/paintjob thread. Alternately, if you wish to discuss how/why you did something or ask for feedback, you may post a new thread with pictures of the blaster (and a link to a video if you wish) and a short blurb about challenges/method/questions you might have.