Nice one Jeff, certainly seems a good player this McKevitt.
It has been mentioned a fair few times in the forum as to the benefits of technique and practice training. Basically practice as you said improves form. Technique works over long term to improve the player themselves. It is best used on players 25 or under, and I find it works best if they are playing 2nd team cricket whilst receiving technique at first. Some players respond better than others, so sometimes a player might have second team average 10 lower than another batsman, but after a year or two of technique training, ends up averaging more in FC cricket.