Railroadersbrat

I'm in a little bit of a tough spot, I hope I can get some good advice.

I've been working on my FMQ'ing off and on for a little while now, trying to get myself into a good enough rhythm that when I work on my sister's DWR late this spring, I'll be able to do the medallions easily. Problem is, I can make beautiful loops and meandering on my own and when I use my rulers, I can zip through curves without a hiccup, but when it comes to following the stencil lines for the medallions, I'm not getting the perfect points or the arcs I'm happy with. Stencil is a continuous line pattern with Fleur's on the corners and hearts in between the Fleur's, I'll upload a picture of the stencil later if it's wanted.

I'm not giving up on quilting this on my own and I've been flirting with the idea of hand quilting the medallions, because I know I can get those perfect points and arcs by hand, then I can use my rulers to free-motion quilt the rings themselves. I know I'm not exactly breaking the quilting rules by doing this, what I'm slightly more concerned about is the fact that someday, my sister might take her quilt to a quilt show, so I'm sort of leaning against hand quilting unless I do the entire quilt by hand.

I have good days and bad days with my hands, so it's going to make the process longer if I do the entire quilt. She's willing to wait however long it takes, my question is, if you were in the same spot I am, what would you do? Is it actually okay for both hand and machine quilting to be on the same quilt if that quilt is entered into a show?