I know this is a tad old but, I figured I'd mention it in-case someone else had the issue and came here. I actually had it spin out after killing a target with and without the negate chip. I used a very simple remedy for it, I added a Selection Gate (i believe) "If..Then..Else". Wire val-A to the targeter, wire B to the output val for the thrusters, C is left blank to =0. Essentially it checks for a target, if there's a target it will give the thrusters their output values, else, it gives them 0. Once the target dies, the thruster goes limp. Worked out well.