Help wanted!!

Hi all, I am hoping someone can share a technique that will help me master the tight, inside curves on many of the pieces for the Roseville Album pattern. The pieces I'm having the most trouble with are the ones that look something like oak leaves. I am doing needle turn; I trim the allowance to about an 1/8th of an inch, clip the curves and am even using a drop or two of fray check. I still am having trouble with fraying and it's difficult to turn under enough to get a smooth curve along the lines. Any suggestions you have will be most welcome. I will be working hard to try to master this in the meantime. Nedra