Not my design, but you are right. If I were to make this , I'd print it in the orientation shown but the bottom would be flat to give a better foundation for the print.
That said, I'd probably split this down the middle, and make each clip its own clip, and print the clip on its side.
That way you don't have to worry about overhangs and the print 'grains' would be in a better orientation for the spring like effect.