ND would love Harry Miller but I don’t think he is going to ND.
As far as Kristofic & Corrall, I personally don’t have an opinion. I can tell you what was explained to me & it made perfect sense.
Carroll right now is a more polished OL as a HS player. But he has some upside still.
Kristofic has HUGE upside. He is a big time basketball player too who played in back to back final fours. Because of basketball his weight never got over 260-265. In college, playing football only, & in a college weight program, he will be over 300 lbs. He already has long arms, fast feet & great technique. So you add the weight & he will be the full package. The ND staff referred to him as the “dream tackle.”
This is where recruiting services & college coaches differ. The services look at current form. Coaches look at potential & what they can do with them. That is why Urban Meyer, Dabo Sweeney, Kirby Smart, JimHarbaugh, James Franklin... all went after Kristofic hard.
I trust the coaches over the services. But the ND analyst on this site has Kristofic graded out very high. Much higher than his peers. And one thing we do know is ND has been elite when grading out OL in recruiting.