Well I know my example wasn't the best but it was the easiest way I could think of explaining it.
But the breaking part I guess holds true. that and the energy would eventually pale out.. but meh... I still think you could set it up so that it would be some form of controled chain so it would take less energy imput(the cycle I would hope would help reduce energy input requirement.)
The reason being last I read the amount of energy required to start any true fusion reaction actually takes so much energy that the actually benifit is little.
