Sorry but your U21 trainer discussion still doesn't have anything to do with whether or not you can cap a MVP player with a level 4 trainer which was the statement you made that I disputed. I'm still confused on why you brought it into the discussion.
18-21 is the prime time years for training. You have to get a good enough base by 22 to be able to finish off(
CAP) a MVP POT player by 26. I feel like I am repeating myself. Age 18-21 and Age 22-26 are totally different. Training slows down with age, so talking about the 4 fastest years of training when discussing about CAPPING a player is very important and should be brought into the discussion. And I don't think a level 4 trainer can get you a good enough base to be able to cap a MVP, it just isn't going to be doable.
'm not trying to be a dick but could you please provide the proof that a level 6 trainer would provide 'a minimum of about 12 pops' over 6 seasons more than a level 4 trainer because the training data doesn't appear to agree with that assessment.
Sorry...I am not going to release training info on players that are currently on my countries NT team. But if you want to see it for yourself, either buy a level 6/7 trainer are become a U-21/NT coach. There you can see all levels of training and trainers(mainly 5-7).
So here is my question to you.....If you become a U-21 coach, and a manager asks if a level 4 trainer is good enough....Would you tell him YES?