The absolute last thing Tyler Davis should be working on this summer is his 3 ball.
The nba is definitely going to the stretch 4s and now 5s, but you don't need or really even want that in the college game right now and there is plenty of time to work on that after college.
Davis should spend all his time working on his athleticism, post passing, recognizing doubles, FTs and getting comfortable shooting the mid range jumper efficiently. Until he does all that well, he should not worry a bit about shooting the 3 ball.
I'm sorry, but this is a terrible idea and about the worst use of time imaginable for Tyler Davis at this point in his development.