Your probabilities are non-modern. They are Hume's. I like that.
Well, you said "any thoughts?" so I gave you my thoughts.
When you surmise that something is so highly unlikely that, for all practical purposes, it becomes an impossibility, you are saying something that many statisticians would rebel at. But I agree with it. Hume explained, for example, that we don't KNOW that the sun will rise tomorrow, but that we might as well assume it will, because for all practical purposes, we have a good ENOUGH proof that it will. You're doing the same.
This unfortunately puts you at odds with most quantum mathematicians and physicists, who largely have not read Hume and mostly tend to believe there is no wheel that they cannot reinvent. Your use of quanta to get unquantized is an odd cart-before-horse-without-wheel construction, therefore.
Please, rephrase yourself in light of this complaint of mine.