Re: How small can you make a black hole?
You've clearly given this some thought, and spent a non-insignificant amount of time composing your post, but I think you need to think a bit more about this.
What you're getting into here is Preon (Pre-Elementary) theory but at this level you can't start with +ve & -ve particles without first defining +ve & -ve: at Preon levels +ve & -ve are macroscopic properties: the result of combinations of even lower order abstract properties.