[Jasonft]

Potential problem. Does the velocity and rapidly changing position of the KKV, not to mention minor relativistic effects if fast enough, change the difficulty of the jump equations?

Unknown variables like precise mass and speed (to as many decimals as possible) will give your computers all kinds of headaches. Some of them inevitably fatal. Perhaps a penalty to Jump equations that scales upward with the yield of the impactor will make yields over a certain level impractical.

Edit: There might even be a limit on how fast something can be moving and still safely Jump.