Apart from the left hand, he reminds me of a young Michael Beasley (who was a beast in high school and college).
This makes me extremely nervous (I'm not talking about drugs, rather a guy's game that doesn't develop further).
I don't think he's a four. Compare his current game with NBA 4's (Kevin Love, David West, Pau Gasol, Zach Randolph, Blake Griffin, LaMarcus Aldridge etc.). I don't think he could guard them single coverage or take them in the post on offence.
I can't see him getting to 250lbs (i.e 114kgs), I think he will be like Paul George but a bit taller and around 230-240lbs (i.e 104Kg-110kgs). Not many 3's can pull off 250+ and keep their knees and explosiveness