What are you making that you can't do regular magic loop then? The loops will be small, but it should work on a small project.
So what I do is I hold the "joins" or loop ends kind of in my fingers while I knit. Like my little and ring fingers hold on to keep it from opening. I didn't plan that it just is the way I knit with them and I never get gaps. I'll get DH to take a photo in a little while if you need it.