I have found when clipping curves that a very sturdy pair of scissors is the best thing. I have been clipping curves for a very long time with a variety of scissors--from small to large. I have finally found a pair that work best for me. They are the craft scissors that FISKARS puts out. They have a very sharp point and yet heavy duty enough blades the won't separate when put to task in heavy fabrics. I try to go slow and steady and start with a small amount of fabric when doing the heavy curves. They are the best I have found so far. The Micro-Tip (R) is what makes them most useful.