I'm slightly surprised we have locked him in to SDE. Does he get any run as a 0 tech NT, or do we think he is so explosively we want him at SDE?
Physically he could play NT.
NTs though tend to get tied up a lot in the wash. Playing him at SDE will give him a chance to work more against a single blocker or at least with more space. This should let him be a guy who makes more plays, create negative plays for the offense.