I don't see how swapping the chip out could do that. Correctly designed (in our application here), the chip will be determining *when* something gets power, not necessarily how much. For example, the chip won't determine that the solenoid is going to get 9v instead of 3v... but it will determine when (eg. when the trigger is pulled).
That being said, it's still up to the user to use safe settings (ie. not setting the dwell longer than is needed).
If you want to set off and go develop some grand new thing, you don't need millions of dollars of capitalization. You need enough pizza and Diet Coke to stick in your refrigerator, a cheap PC to work on, and the dedication to go through with it. We slept on floors. We waded across rivers. -John Carmack