I just made over 120 of those little devils (isosciles triangles) for star points. That's 120 after the first 10 or so that didn't come out right. After about 5 of them I decided to make my side triangles oversized, then trim to fit. Just buy extra fabric and go for it. You can always use the odd one or left over fabric for pillowcases or potholders. Oh, and paper doesn't act like fabric, so you need to practice with the real thing. Have fun and don't get stressed about it. Perfect 1/4" is not required (there are no quilt police), just get to a standard size that works for you.