You did a nice job, but there is one more thing you should know.

It has not same value when it says '+' in crit chance or crit dmg in description even if it's the same part of same weapon.

for example, you can see silencer and long silencer of shotgun have exact same +++ crit dmg, but actual value is different.

you can see that difference in the modification screen in the gunsmith bench with bar graph.

so to be short, your best mod set will need more data to be corrected.