I think it's great just the way it is. Maybe switch the center and the lower left one. The only foreseeable issue that I see is that the black you shadow with may make the T-shirt black wash out a bit. I would take at least the black T-shirts when I buy the shadow fabric just to double check for a great match before you buy it, wash it and find out it washes out the T-Shirt. (You know how many shades of black there are in fabric). Looks great!