So the stock Threat Tracker is fine. It works. As long as you don't bump it or shake the table or tilt it... The problem is that spinny spinner. I've gotten annoyed with it enough to take matters into my own hands.
You can check out the process to create one of your own on my blog:
Great looking but what bothers me most about the spinner is that its so loosey goosey, I would love to find a way to add some resistance to the mechanism. Currently I support the tracker on two card board barriers to lift the unit up from the table. This allows the pendulum/pointer to rest on the tracker and somewhat eliminate the issue.