Indoor Chuckit Ball Thrower

My dog is a nut for playing fetch, and while I love to play with them, I do not love the experience of slimy fingers that comes with that play. The ball flingers that are commercially available work well outdoors, but they hold on to the balls too well for softer lobs inside. That's why I made this. Something that fits the 2-inch Chuckit balls and doesn't take any force at all to dislodge it from the thrower.

I couldn't figure out a way to print this thing without supports. The orientation that's in the pictures has given me the best results with a mostly smooth print (except where the supports come into contact with the handle).