[Quranic Reflection]: Quranic manuscripts from 1400 years

[Deesse23]

No it isnt a must. Quite the opposite. Islam dictates so!
#1 Islam dictates that the Quran is the unaltered work of god
#2 You want to collect additional evidence to make sure you arent fooled by Islam
Conclusion: You cannot be a Muslim, at least not a True Muslim

It is a must; I can't imagine a person with disability like being deaf+blind+mute, reading the theory of General Relativity.
As to the points you presented; indeed the Quran is more than okay about people checking if it's the truth or not; look at this verse for example:

You just admitted again that the Quran is in opposition to Islams dictate!
Islam dictates to take the Quran at face value and not check if its the truth.
Its becoming obvious to the observer that you are avoiding cognitive dissonance by flat out refusing that the two stand in contradiction.

But the Quran itself told me to observe and contemplate.

And Islam dictates to take the Quran at face value. Who is correct Quran or Islam?

On a sidenote: What is your method of collecting evidence?

Fix your information. It did tell you that in 30: 6-7-8

 There is no method described. Please try again, or describe your method in your own words.